Why do some people play obnoxiously fast in a 30-minute game (and often still defeat me)?

I get really annoyed when I want to play a 30-minute game and my opponent basically plays speed chess, taking like 5-10 seconds for each move like there's no tomorrow. (And often they still beat me!) I still take my time for my moves, but it's like they're trying to show off. It's so obnoxious. 

Why do people do this?

I really don't get your question...

If they know what move they want to play, why should they waste their time? Are you asking for time odds or something?

If they can play so quickly, why are they playing a game with 30-minute time controls? This isn't blitz chess; you need to take time to think about your options before moving.

Because they feel like playing 30 min... You need to take time if you don't know what you want to play, if you know what you want to play there is no reason in wasting time just because it's not blitz or because your opponent takes too long every move

They playing fast could be 1 of 2 things, they either know that specific position/theory  of that opening and then blitz out a move because they're in their prep and know what to play... OR they're just throwing moves that are weak and it's up to you to punish... either way, it seems to be working....

Depends on how comfortable you are. For most mid-level players, they would have a few comfort openings, and if you play within that comfort, they would naturally blitz the opening moves.

Because any time you can save now on a move you figure out quickly is time on your clock later, when you do need to think longer. For example, I play the London, and I know what my first four moves are going to be as white in like 99% of situations, so I just don't have a reason not to make those moves right away.

In the opening, especially at a higher level, there is almost no calculation involved. The top gms are pretty much busting out theory and playing quickly during the first couple of moves in order to save more time for later during the game.

I play very fast because when my opponents take a while I can think of moves I want to play. It started off as a bad habit because I sucked at seeing the board but now it is an asset as I can spend more time analyzing the end and mid game.

im new to chess, and just learning how to play. can you help?

I'm playing my fourth game against my uncle, who happens to be a world leading mathematics doctor (retired) I don't want to cheat, and this is the first time I've asked, think I know what to do, BUT any opinions?

Never mind.

Optimissed, changed my mind. I was going to post the board. But if I can't do it, what's the point?

maybe they just know the opening really well and want to save time for middle game deep think , idk 

Such a weird complaint. You are getting way more time than your opponent and that's a bad thing? I'd love it if I got 30 minutes to think and my opponent only got 5. I guess it's true that some people will complain about anything.

I gotta ask: are you mad at your opponent, or are you mad at yourself for losing to someone who used 1/6th the time you did?

Yeah, pretty much the latter. I'm trying hard to learn to play slower, and it's just annoying that people can play way faster than me and still beat me.

Hey you!

Keep doing what you do, it will make you a better player. There are more low rated players with huge opening knowledge than grains of sand in a desert. However those players will never make it far as it is all they know.

Speaking from OTB experience, I had similar experiences on both my side and their side in the opening - one thinks deeply and gets a slight advantage in many cases, the other one blitzes out the moves - it often still is an equal game - the trouble starts after that. Blitzing moves out puts a high psychological pressure on the opponent, also concentration and time are running out. Therefore the one who had no idea what he was actually playing might win, because the anger, frustration and exhaustion causes blunders later on.

Don't let it bother you. High level chess also consists of a lot of theory and masters usually start thinking deeply about positions they haven't seen before and may play the opening rather quickly. I understand however that it might be frustrating facing this as you call it "show off" behaviour early on. Well, there are a lot of youtubers and opening suggestions, also a lot of kids copying it and they are just excited to play it and get into their comfortable position they've learned. That is perfectly fine from a winning perspective.

In a sense however, the spirit of chess has been lost by computers and repertoires and time pressure. Beginners are so used to playing blitz and bullet that they aren't able to calm down in slower games, hence they continue playing in the same style. We live in are world where nobody seems to have time for anything, while in fact has plenty of time. That is the way it is. It doesn't get much better at clubs and sometimes not even at tournaments. I understand your desire, you can just help it by sticking to what you do and keeping classical, chill and nice chess alive. Play slow and improve. Enjoy chess. Or find a partner that suits your playing style.

Greetings.

@shady character (can't quote).

Thank you so much @pizzamitknoblauch! I love your encouraging response. Just what I needed to hear!

Maybe people just get enormously bored and decide they want the game to be over with

30 min games (rapid) have most trophies for league, mabey they just wanna get the trophiest  and split

idk