unfair player Karimjo

Guess it all happens to us from time to time.
You want to make a move, and you release the piece a split second too early.
Well then you have two kinds of players.
Players who are normal and allow the takeback to let you place your piece on the intended spot, and players who start saying it is not their problem.
Well player Karimjo is in camp 2.
Just blocked him, would be nice if you guys did the same

I have had the most heartbreaking experiences from players reactions to this problem. What I did is switching off the takeback option so you don't have to get nervous with irritating players and just focus on your game.

This name & shame thread were better closed.

One time, in an OTB tournament, my opponent castled by grabbing his rook first. When I pointed this out, he admitted it but pleaded me to allow the castling anyway ("you know how it is, playing in the morning when you haven't slept well"). We argued over it a for a few minutes and I eventually relented, but the arbiter had witnessed most of it.

I was irritated at him and my concentration was gone. I played badly and lost.
My opponent got banned from tournaments for a few months for disturbing the other players.

Note: he was an FM. Had he been a beginner I would have just quietly explained the rule to him but allowed the castling.

Don't ask for a takeback if you're not okay with it being rejected. If you want to avoid mouseslips, go to lichess.org/account/preferences/game-behavior and turn on move confirmation.

(I used to have takebacks turned off here because of too many people asking for takebacks in bullet of all things. Nowadays I may or may not allow a takeback, and may even rarely ask for one, although most of the time the thought won't even occur to me).

Asking for takebacks in rated games is absurd. It's touch move.
The feature is great for casual games and coaching.
Otherwise, in preferences, game behavior, disable the option allowing requests and end this whining in rated games. We see several new threads on a daily basis of players complaining about mouseslips, calling out members for bad sportsmanship when they most likely, (sensibly) already have the feature disabled.

Vampele, thanks for the move confirmation option, didn't know about that one.

You let your clock run down to zero from 40 minutes without resigning and you have the nerve to call karimjo unsportmanslike?!

And you send no less than three takeback requests?

Have you no honour or shame?
You're a disgrace to the game!

Quite common to see players who name and shame, call out other players, suggest blocking of said player; end up being the one who gets blocked by the community.