Chess Isn’t Fun (AKA my chess depression)

I suggest:

Don't play at night.

Don't use the engine for analysis, spend 20 + mins using your own thinking.

Don't play games less than 30min

Play more than 1 game a day

Don't play humans until you've beat Nelson and learned how to deal with early queen attacks.

Consider starting a new account at 800

Don't worry about openings 

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Playing slow and analyzing by yourself have been suggested to me by my coach, and I can tell I have grown a lot since, alongside with training on woodpecker method. Spot on dude. 

Umm, don't take this the wrong way but if you were blundering any less than 5 times at 300 level strength it'd be pretty strange.

Also chess strength isn't derived from tactics or books, it's from experience. If you learn a new concept outside from a book (say pins), it should be enough to practice over dozens of games til you can recognise it easily. Don't read chess books to completion (especially at 300). Read a chapter (maybe even less), find something you feel you understand and play. Have that lesson at the back of your mind. Don't look for the pin. Recognise a pin when it happens. Then play another game. As you improve, you'll notice how little you blunder and how many best moves you find.

Also tilt...On a good day I can play a streak of blunderless games with best moves reaching up to 20-30. On a horrible day... Well 5 blunders isn't all that much.

I'd also suggest playing daily chess and vote chess.

For daily, really consider each move. And concentrate. You usually only need to make one move a day so make it count. As for vote chess, you need to find a good club that communicates well and takes it seriously. Whenever there's a move that you don't get, ask. Pick the brains of those who suggested the move. Even people at the same level as you have unique insights.

Last thing I would suggest is reading blogs and watching Levy. At 300 he's explanations get the job done.

That's all the advice I could give you that wasn't “play slower time, do more puzzles, read more books, don’t focus on openings, be paranoid, I can coach you, you should just quit, take a break”.

Last thing I would suggest is reading blogs and watching Levy. At 300 he's explanations get the job done.

You say you have read many books, study for hours and had a coach but none of this is evident in your games. Looking through some of them, you play usually the Italian Game (then you usuaaly try and go for the Fried Liver attack which is unadvisable in rapid, especially 30 min, games). When studying, you musn't be studying the right material if you still connot refute the Wayward Queen Attack, even though you say you have learnt 5 different lines to refute it (I don't know if there is even five lines in the Wayward Queen Attack, and I would be suprised if a 300 rated player knew five lines of any opening). You also resign for virtually no reason in what is possibly the majority of your games (I know you say it is you feel humiliated so you break your rating, but you still lose against players of the rating you have 'broken down' to). You also need to practise your middlegames and eventually seeing blunders will come naturally to you. I know you are saying not to tell you to read books or study openings to improve, but there are not many other ways to get better at chess.

Also might add that IQ has nothing to do with chess.