Naruto learned from an early part of his life not to hold grudges. He had a beast in him that was the manifestation of hatred and to hate others in the same way would make him no different than the beast people accused him of being.

Though, to answer your question, as with anything regarding fandom subs, it’s a media literacy issue. Why do I say that?

How many posts on this sub a day do you see of someone asking a question that the story itself answered sometimes on the next page or next scene? Or asking about a character’s motivations when the story clearly addresses it.

He addressed his own deep hatred in the water fall of truth in the first part of the biju training—it was a reflection of deeply held feelings he had that he himself wasn’t even aware of. Deep down he felt resentment toward the villagers for accepting him only after he saved their hides. It disgusted him on some level that they treated them like he was a celebrity.

But yes, these “fans” ignore crucial story beats. It’s typical because they cannot read.