IDK, to me ‘bleed’ is letting your (the player’s) emotional read on situations to color your character’s actions. It’s not a problem if your character’s emotions bleed into you, that’s - as pointed out- the expected outcome. That’s what makes the hobby addicting.
The issue is when you are making things weird with your character reactions due to your ooc read on situations.
Look. I absolutely believe that there have been occasions where player/s decide to be mean on purpose in order to drive someone else away. I am SURE it has happened. I am also 100% sure that it doesn’t happen even half as often as people assume it is happening to them. The vast majority of people who step on your feelings are not doing it ‘on purpose’. They aren’t even thinking about you.