Some time ago I tried to play and set aside a certain part of the winnings; I even created an Excel table for this purpose and wrote there when and how much I won, as well as how much I set aside from winning bets, including express bets and slot games.
And you know, I got tired of this, especially when I was recording large profits from the slots. It's tedious and takes you away from the game. But I want to play and not think about it.
It is not surprising that this is happening to you, in my experience the majority of the people hate doing their taxes or setting a budget, and what you are doing is very similar to both of those activities and I find it natural that you got tired of it, as the majority of the people that gamble do it to obtain some fun and to relax from all the pressures and responsibilities that they encounter on their everyday life, so the last thing they want to do is for gambling to become just another burden.