They are mostly Shanks Fans, Other Top Tiers Fans, Luffy Fans, Sanji Fans & Zoro Haters
The Story revolves around Pirate King Title & those who stand in it's way or chase after it
But when they see someone roaming The World in a Small Coffin, Trash talk a Yonko in front of his Crew & suffering from Boredom due to Success, they simply cant help but feel offended & start hating him
The guy simply shits on all Themes of One Piece Story
He is like: "Who needs a Crew, who needs a Flag, who needs a Ship, who needs Politics, who needs Friendship, who cares about Yonko, who cares about Marines, i will just live as The Strongest, and when i can't find who Rivals me, i will just Train one to become so"
I don't blame people who hate him, the guy shouldn't be in One Piece, maybe Oda stole him from Akira or something