How not to suck - please any tips 😭

I joined 6 weeks ago, I'm new to chess but really enjoying it. I did all the New to Chess tutorials, all Beginner ones and 3 out of 5 of the Intermediate before my free week ran out. I managed almost all the challenges. I've now played 250 x 10 minute "rapid" games and I have a lose rate of 52% and draw 5%. I enjoy it but to be honest when I win it's sometimes a suprise that I didn't plan. I think it's a good move then it turns out to be Checkmate. More worrying is I often lose with brain-dead moves that make me want to crawl out of my skin the minute I've made them! I don't seem to be able to see an obvious error until the pieces are actually in their new position, then it's too late. it's very frustrating that I can't visualise all the new positions, I think have then boom my Queens gone by a Knight. it doesn't seem to be improving. I started at 800 and hit 400 after 6 games, now I'm hovering at 350 - I feel stoopid, especially when people are 1400 and like "I'm not that good" perhaps my mind is not cut out for chess? or maybe I need to make a move, look at it and then have the option to put it back (that's not cool in chess though is it?). Any tips will be gratefully accepted and tried. I don't want to be a pro but I want to be happy with my game, if I analyse every single move I run out of time.

I say that I suck at 1400 because I’ve been losing 90% of games this past week, which dropped me down 200 points.

The feeling of being bad at chess doesn’t go away, you can here Anand, Hikaru, and Magnus say the same things “I’m so bad at chess”

It’s natural to feel that way after playing one or more bad games.

Look up basic checkmate patterns, such as the greco, corridor, or smothered mates.

Do frequent tactics puzzles, this is what sharpened my tactical vision.

Follow opening principles control the center, develop your minor pieces to good squares, and get castled quickly.

Watch out for cheap tricks such as scholar’s mate.

Study basic endgame concepts, such as opposition and outside past pawns.

Help I may be gay

Try some 30 minute or daily games, gives you more time to analyse your moves and understand different positions better instead of just playing reactively. I’ve been on here for over a year and I still don’t like the 10 minute games, I either get stuck over analysing a position and run out of time or rush myself and make horrendous blunders.

Maybe someone with a decent rating would see it differently though..