I haven't read everything so the answer I give has maybe given already.
I was , 30 years ago, 2200 FIDE rated.
Playing 25 games a day means nothing.
You want to improve?You have to forget the word "fun".If you are having fun then you probably do something wrong.If your wins makes you happy and your defeats unhappy , you are not improving.
You have to decide what you want from chess.You want to have fun or you want to improve.Can't you have both?You can improve just by playing.Experience is very important in chess but this is uncontrolable improvement that eventually hits an unsurpassed wall far sooner than it should(all hit a wall eventually , the point is to reach your peak, whatever that is).
Here is the key to improve:
Play one or 2 games(max) a day with LONG time limit(at least 60 min).
Analyse deeply every game(as deeply as you can).
Note your thoughts and your plans in each move.
Ask from better players to analyse your games and tell you what you were doing wrong.
Realise that wins don't make you better , defeats do.
Wins only verify that you are getting better but usually nothing more than that.
If you are feeling bad for losing while you want to improve , then it's like feeling bad for doing exercises while you want to improve your physical condition.
Unfortunately losing in chess is essential for any kind of improvement.
But..........
You have to know why you lose.
You have to avoid losing doing the same mistakes.
And to do that , your mistakes must be the result of thorough thinking.
And to do thorough thinking you need long time controls.
Otherwise some kind of blindness will always haunt your game.
In case I didn't say it clear enough
DON'T PLAY BLITZ
If you can, play a long game , analyse it , study middlegame and engame and if you still have some time , then some blitz games can be "fun" and relaxing and in some cases even help to improve.But only after at least 4 hours of serious and painfully focused study.
Do you analyse your games ?
Do you study endgame?
Do you analyse great players games ?
Do you focus on your study and forget everything that bothers you?
4 simple questions.Answer to yourself sincerely.
If you answer "No" in one of them then you know why "blindness haunts your game"
p.s.About endgame , I know what some fools might say(and yes they are certainly fools).
"I never reach endgame, why study it"
You don't study endgames to be able to win them , that's not the goal and that's not the real value of endgames.
You study endgames because they help you increase your calculating ability , helps you increase your ability to plan and it's the best way to learn the properties of the pieces.
Kramnik said that he solves endgame studies because it helps him sharpen his tactical abilty.Yes , they even improve your tactical ability.Nezhmetdinov , considered by many a tactical genious , the only thing he took with him when he was in hospital for long was a book with endgame studies.Back then, when engines and tactic trainers didn't exist , players like Tal and Fisher used endgame studies to sharpen their tactical abilities and even today players like Kramnik still use endgame studies for the same reason.