>>507179604>You can't just develop board vison in a couple of months.Can be fixed with puzzles, although you'd have to do 30-40 everyday (from books, not online slop)
> His other problems like not recognizing critical moments, Can be fixed with puzzles
>playing with time pressure,Can be fixed by using Dvoretsky's puzzle solving drill (Lev Alburt discusses it in his puzzle book)
> bad calculation,Can be fixed with puzzles
> getting mentally stuck on plans for some reason,Can be fixed with puzzles
> opening repertoire that's not youtube clickbait,Can be fixed by not being a Caro-Kuck Londoner
> knowing the plans in your openings, etcCan be fixed by reading good books on the opening instead of collating lines via chessbase, which is what he does, or which is what he did with his opening videos.
Puzzles are genuinely the answer when it comes to most chess problems. The rest is endgame technique and positional ideas, which can also be learnt via books such as Fundamental Chess Endings by Muller and Techniques of Positional Play by Bronznik and Terekhin.
I guarantee he's both not studying the right things and not studying hard enough. After a long study session, be it chess or mathematics, you must be utterly, UTTERLY drained of all energy. Is he doing that every day? I doubt it.