He disliked the idea of Winnie-the-Pooh being commercialised.

Umm, he sounds like a (Pardon my inability to articulate a better description) whiny bitch?

I would slap the shit out of myself if was currently holding a grudge against my father for making a massive fortune known to everyone in the world off of my childhood toys lol. Hell, I just wish they didn't all get thrown away, ninja turles are hella valuable now.

he grew to resent his father’s Winnie-the-Pooh stories because he thought they were exploitive. Also, he became estranged from his mother after marrying his first cousin against her wishes...A few months after his father's death in 1956, Christopher's daughter Clare was born and diagnosed with severe cerebral palsy

J. K. Rowling's kids didn't start banging their cousing out of spite because of the rest of the world liking Harry Potter too. You're a grown man, get over it Christopher lol.