The reason he pretends he hates all the nice things people does for him
It's because he is actually scared of love
After losing his grandfather and being left behind by his old team
He became scared of all the people he loves and cares about leaving him in some way
That's why that whenever someone get offended or sad by something he did or said
He instantly goes into a state of fear and immediately starts apologizing
Because as much as he's scared of love
Abandonment is his biggest fear