By not studying. I don't have a single chess book at home. I discovered 60% hippo defense myself and rest 40% i watch simon wiliam hippo game on youtube. Also i am doing tactics trainer and tactics lesson on chess mentor. And my game plan is simple " steal the opponent pawn around his king" . i generally play 30 min rapid at chesstempo. I generally prefer that website because they use analysis graph so you can know who was winning at that moment of the game. Chesstempo use komodo. I think chess.com too implement that feature.
Why is studying chess so tedious and how can it be made more fun

You don't study, just write the line you want to play and all the possible good responses your opponent can make and the moves you will make after. Then when you have the full graph just use it in your games until you remember without having to watch, I have some threads doing this:
https://www.chess.com/forum/view/general/giuoco-piano-classical-variation-center-attack

In general people want the results of hard work without the hard work. That may work in some endeavors, but learning most worthwhile things requires significant effort. And although the "follow your passion" people might tell you all that hard work is going to be fun, sometimes it just isn't.
It is an OK thing to decide you would rather just play for fun and not study. But if you want to improve significantly, some hard work is going to be necessary.
Clearly at your current playing strength you know this better than I do. I can relate. But sometimes we just need to push through.

I don't study regular books anymore. Now I get my books from everymanchess site, they come in cbv format, and I can study them with the free chessbase viewer (with the chess board on the screen) you just go through the different variations on the chessbse viewer chess board. you can also have a chess engine evaluating the position for you, I have stockfish 9, houdini 6, komodo 9, fritz 13 and 15, rybka 3, and some other engines that I don't use.
I do not study too many books either anymore, just 1.d4 books and Sicilian defense books, that's what I play these days

- True majorities, in a TV-dominated and anti-intellectual age, may need sound bites and flashing lights—and I am not against supplying such lures if they draw children into even a transient concern with science. But every classroom has one [Oliver] Sacks, one [Eric] Korn, or one [Jonathan] Miller, usually a lonely child with a passionate curiosity about nature, and a zeal that overcomes pressures for conformity. Do not the one in fifty deserve their institutions as well—magic places, like cabinet museums, that can spark the rare flames of genius?
- "Cabinet Museums: Alive, Alive, O!", p. 246
- Elitism is repulsive when based upon external and artificial limitations like race, gender, or social class. Repulsive and utterly false—for that spark of genius is randomly distributed across all cruel barriers of our social prejudice. We therefore must grant access—and encouragement—to everyone; and must be increasingly vigilant, and tirelessly attentive, in providing such opportunities to all children. We will have no justice until this kind of equality can be attained. But if only a small minority respond, and these are our best and brightest of all races, classes, and genders, shall we deny them the pinnacle of their soul's striving because all their colleagues prefer passivity and flashing lights? Let them lift their eyes to hills of books, and at least a few museums that display the full magic of nature's variety. What is wrong with this truly democratic form of elistim?
- "Cabinet Museums: Alive, Alive, O!", p. 246. Stephen Jay Gould.

it is only tedious if you believe it to be hard and boring work. sometimes a change in perspective can make a big difference. think about why you are playing chess and what attracts you to this game. if you have true passion for chess, then studying openings and improving your skills no matter whether in middlegame, endgame, tactics, strategy, positional, etc. will seem like a rewarding and fulfilling endeavor and you will enjoy seeing the results of applying yourself.

If studying chess and learning new things isn't exciting on it's own , then either you study the wrong books or you study them the wrong way.
p.s. There is a 3rd option (you are lazy) but I won't mention it , oops already did.
Well it's got to be the lazy option because the books im trying to study are top notch. Kasparov's book, Zurich 1953 etc.

No I have not set goals. Even when I set goals they are unrealistic. Like I think Kasparov's book would take about a couple of weeks whereas in reality I think it would take a year.

By not studying. I don't have a single chess book at home. I discovered 60% hippo defense myself and rest 40% i watch simon wiliam hippo game on youtube. Also i am doing tactics trainer and tactics lesson on chess mentor. And my game plan is simple " steal the opponent pawn around his king" . i generally play 30 min rapid at chesstempo. I generally prefer that website because they use analysis graph so you can know who was winning at that moment of the game. Chesstempo use komodo. I think chess.com too implement that feature.
everything that chesstempo has, both chess.com and lichess have. including the score graph
One tip that I have found useful is, DeirdreSkye has pointed out, work on 1 item at a time. Don't get too hung up on every minute detail. For example, when playing white, what opening am I comfortable with and works for me, d4,d5e4,e5. Reading books and studying is fine but if you are unable to apply the principles that it isn't working for you. Play games and keep track of what works and what doesn't. Use the review function and you can see what some better moves may have been and you can use that in future games.

yeah i like the idea of studying one thing at a time. if only i were so methodical perhaps it could be done.

In general people want the results of hard work without the hard work. That may work in some endeavors, but learning most worthwhile things requires significant effort. And although the "follow your passion" people might tell you all that hard work is going to be fun, sometimes it just isn't.
It is an OK thing to decide you would rather just play for fun and not study. But if you want to improve significantly, some hard work is going to be necessary.
Clearly at your current playing strength you know this better than I do. I can relate. But sometimes we just need to push through.
In general, you have stated well a fundamental truth about human nature. As Kasparov stated, working hard is a talent.
Here's my advice- if you can, as you read about something, either set up a board and play against yourself using the strategies as an experiment to see what works and what... Doesn't. Or, more ideally p, try play against someone else- or a computer- in a friendly (or competitive) match. Maybe try learning with more exciting variants as well.
(Please again remember I am a bad player- but good learner outside of chess- and these strategies may be useful nonetheless
Well it's got to be the lazy option because the books im trying to study are top notch. Kasparov's book, Zurich 1953 etc.
You got an example of how the Zurich 1953 book is tedious?
As far as middlegames you have to put the items into action. You have to put the items above rating in priority. If Im reading about open files, and I have a game where I could do that or a convincing attack otherwise, I should try to use the open file at risk of losing. Or you can wire your brain to only celebrate cheap tactics because tactics is everything crowd. You have to look at the book as lessening the tedious work of small details and not causing more tedious work....otherwise the book isnt for you.
Typically, I will pick up a middlegame book go through the first 15 moves or so then I feel like a feeling of being saturated. So I think I will do somthing that requires less effort and so I start playing blitz games. I am really slowing down my improvement by not studying theory but it seems hard to do. can anybody relate to this?