Normally I'd agree charge back donations to troll someone is going too far but in this case I don't feel bad for him. He pity begged his audience for surgery money (
you all probably remember the infamous clip), his audience gave it to him then when he finally got the expensive surgery he willingly made the whole thing entirely pointless by continuing to overeat.
Beating a surgery designed to physically impede you from overheating requires active effort and he puts the effort in directly on stream for the very people who gave him the money who tried to help him.
I think anyone giving him money is dumb as bricks, troll or not. But I have trouble feeling bad for him at this point