Nobody is "too dumb" for chess. You've made the post voicing your concerns that you're not improving but then prefaced it by saying, 'I know I don't study, analyze my games, I play inconsistently, and often play when I slept poorly or am tired.' To me, it seems like you have the answer to your own question, you like playing chess, you like winning at it even more, but you don't want to the things that are necessary for improvement to win more and get your rating up. Sorry to rain on your parade, but improvement will be extremely slow or nonexistent if you don't at least start with analyzing your games. If not, you making the same mistakes over and over again will ensure you don't improve. Apologies for the blunt response, but it's what you need to hear and will surely help your chess.
I think I'm just bad at chess.


No, I'm thankful for your answer. I guess I already had that in mind but we only fully accept these thoughts when someone confirms it. I think I'm a little too lazy and expect some things to just happen for the good as, although I knew that chess is a game that can and is improved, I had that little feeling that, by what others think, It is a "game for smart people". I don't see myself as someone really smart, but I don't think I'm dumb either, so it made me question even more what are my capacities. I'll seek more how to evolve, thank you.

@LightningShadow00, I've already heard about it and try to, but I keep playing and loose more, and get worse. As you said, it is bad for my self-esteem. I guess I should be more thoughtful about how I play aside from only playing.

Heya! Amber here! I totally get how frustrating that can be. Chess is one of those games where progress isn't always linear, so don't compare your progress with others! It's easy to feel stuck or even like you're getting worse the more you set your expectations based on how others have progressed compared to you. First off, you're not dumb! dummy! chess is incredibly complex and intelligence isn't the main thing, even for top players.
The main thing is dedication! That's pretty much enough to get to advance. In Hans Nieman's words "You have to believe you got it to the point of delusion", the guy's a biiiit controversial but there's wisdom in those words.
As you said, you don't study and review your games, and that's totally fine! 600-700 elo for a casual player is normal. You're not bad at chess. You're normal. You're doubting yourself, wondering if you're doing something wrong, when you haven't even tried! Don't sell yourself short! I'm sure if you study results will come.
That said, do you want to study and dedicate? Or do you want to keep chess as a leisure hobby? Sounds to me you're getting ready to study, but your thoughts are getting clouded by doubts and just need reassurance! But both options are good. It is up to you on what you want chess to be in your life! If you choose to study, I look forward to play you on equal footing one day! Maybe you'll even surpass me, because ill be honest, I too am feeling stuck! we're all on the same boat.

Hi - I think you need to change your outlook on the game a bit. From what you've written it doesn't sound like you have delusions of being a GM or an IM or even making money from the game. So perhaps ask yourself why you are playing - does your enjoyment of the game depend on your rating number? If the rating number wasn't there would you still play? If the answer is yes, then clearly you are playing because you enjoy the game, and it is just that - a game that sometimes you'll win and sometimes you'll lose.
Unfortunately a lot of threads on this forum are highly focussed on ratings improvement, to the extent that if your number isn't going up you are somehow failing - this is BS in my book. Instead, what if you judge your own performance based on whether you enjoyed the game irrespective of the result? Relax, accept that you're going to lose as much as you win. Take pride in your good moves but don't dwell on the bad (perhaps try to learn from them so you don't repeat them in a similar position). Chess isn't about some arbitrary rating number, it's about enjoying a game in your spare time.

I really like @CoachBucci response like if you are expecting any golden piece of advice well forget about it because it doesn't exist. Though there is general advice and I made a blog giving some of mine and hopefully it'll give you some guidance.
https://www.chess.com/blog/KingsideCastleNotation/how-i-got-2000-a-guide-for-you
It also seems like you are struggling with doubtfulness, listen man I thought I was to dumb for this game so many times but I never gave up and realized that chess is a game of not just the mind but also perseverance in the face of obstacles.
I hope these words help, if you have a question don't hesitate to message me.

If you're trying to get better at chess then you're good at it. Be confident & well rested when you play.

Thanks, you all. I don't think I have the time now to answer everyone individually as it's quite late, but maybe later I will. Following your recomendations, I settled down at my computer today focused and managed to win many games in a row, seeing the mistakes I made afterwards (many missclicks, lol). As @DuncanSpencer1 asked, I was kind of doubtful about the game, thinking that I was more addicted to the thought of winning than actually liking the game, but after thinking for a while, I know I like it and intend to get better at it. Also, thank you @OutriderAmber_PlaysChess for the words. I have to admit I was a casual player that wanted to get better without putting the effort for it, but now I'm sure I will try to get better and maybe get on equal foot to you all one day.

As a chess player who went from struggling with 300 in 2022 to defeating 2600 level chess bots and high level players in 2024, I think that the first step to succeeding in chess is having a Positive Mindset and a great commitment. Instead of telling yourself, "I can't do it", tell yourself, "If I practice, I will perform much better in the future." It's also important to understand that improvement us a gradual process.

I mean, just look at my games in 2021 😅😅, but it never got to my head that "I'm just dumb". I was committed to improvement and it happened.
Also, I've heard that you play really good games and then blunder. One piece of advice I would give is to always look at what your opponents can play, never play a move without considering what your opponents can play.
Ever since I started playing chess I play for a while, get a little better, then, for some reason, start a big loosing streak and stop playing it slowly. Now I started playing it again but it seems that the more I play, the worse I get. My elo is so low and it's driving me nuts, making me feel that I'm dumb. I know that I don't study chess, I just play, and rarely study my games. Lots of games that I play are when I have slept badly or am just tired and I seem worse. But still, I find myself being too bad. I began playing more bullet in the last weeks and it seems to make me worse. My games are good and then I blunder something badly and loose, just resigning. Am I doing something wrong or am I just too dumb for the game?