why Chess is no longer fun?

Just asking, since losing sucks out the fun from playing, losing rating from 500 to 400

I looked at the stats i'm only better than 14% of every chess player?

Am i intellectually disabled? 

A rating of 400 - 500 is a sign of frequent blunders.
Chess will be more fun if you blunder less.
Always check your intended move is no blunder before you play it.
It is not a matter of intellect, it is a matter of mental discipline.
That alone will propel you to 1500.

I'm rated 400 but I can beat 1400 computer AI 9 out of 10. But playing online at 400 gives me like 50:50. Thats because lower bracket has a lot of smurfs, assistant tools, or cheats.

It's ok if you're 400ish. I'm stronger than 99% of the bullet and blitz players, but I highly doubt that my IQ is higher than yours.

Not like you're disabled or something... I am a ~1250 player. February this year I just completely got annihilated and came down to 1050( lost 200 elo) but You bounce back too. I regained my rating and I'm going ahead as well. For you to improve I will suggest to see analysis of the games played by good player (You may follow some streamer for this reason). That will make you understand openings pretty nicely and you should be able to reach 800-1000 after that. Also, you can take helps from your friends in your Chess world or on apps like chess.com etc.

Kids

Kids are noice

literally who

@4go10_legend

well now my rating dropped from 400 to 300

lol this game is just bull , i must be the most intellectually disabled person in this game 

If losing sucks the fun out of playing chess, then you probably shouldn't play chess. It will never be fun if winning or losing is how fun is measured. Just like Monopoly, checkers, or any other board game the fun is in who you play, not how you play. 

Exactly

You are probably within the range of "normalcy." Is this your first ever chess.com account? Your profile indicates you only joined a few months ago. 400 rating with little direction is reasonable; it is a starting point. Practicing fundamentals like chess opening principles:

https://www.chess.com/blog/KeSetoKaiba/opening-principles-again 

and working on improvement will likely get you at least over 1000+ chess.com rating with some time. 

True, 400 might be 14 percentile (varies on rating pools, but this is another [mathematical] concept and a different topic of discussion than here). What you must realize is that the "100 percentile" (player pool) is comprised of EVERYONE; it includes titled players like grandmasters as well as hobbyists just starting out...but most of them have played chess for years. This is experience and an advantage you do not yet possess. This is okay. There is a bit of a learning curve with chess, but if you put the time in and keep learning, then you'll probably improve just like most things in life

The chess.com average rating is something like 1150 rating (varies over time and is slightly different for various time controls, but I'm using chess.com "rapid" because 10 min games (rapid) is the most popular time control played on chess.com.

1150 being average is very reasonable to reach; granted, it may take a lot of time to get there, but chess rating is tougher to gain as you increase in rating. The ability of a chess player being 1000 versus a 900 is about equal to a 2100 versus a 2000, but the 2100 from 2000 is a WAY tougher gap to close. This means that rating increase isn't linear. Starting out with 400 rating after a few months on a new site is reasonable - there is likely nothing wrong with you; it is just that you probably haven't put as much time into chess as the "average" chess player...yet

tygxc told you everything you need to know to improve to 1500, and instead of acknowledging his words, you ignore him, and continue on to indulge in self-pity. You will never improve with such an attitude. 

LordErenYeager, blaming your lack of improvement on such things won't get you anywhere. Search 'locus of control' and do some self-reflection.

i am down because this weekend there have been too many opponents clearly using engine assistance, or some such. and so many draw offers in the opening, i would like a higher percentage of games that were not suspicious.

The average rapid rating displayed on the rapid leaderboard is currently 815.39. I've been tracking it daily since just after 10|0 became rapid in Sept 2020. In that time, it's dropped approximately 200 points and continues to decrease each day.