When I lose a hand, I analyze what I did wrong, which I could have avoided losing. Especially when playing cash game. Often it is for a simple lack of reading of the game, think about the possibilities that the opponent player has. But it's part of the game, I already lost hands that I won with Full House (k-3) on the river and another 3 came and the player made Quads of 3. Apart from almost playing my notebook on the wall after losing a hand like this, I saw that I should have been more aggressive in the move and thus avoid having lost the hand and expelled the player that made me lose LOL