You have no idea what personal messages he has been sent, just because you haven’t seen it, it doesn’t mean it didn’t happen!
I can’t comment on what ifs, neither can you. I can only comment on the evidence seen outside of private messages, which doesn’t show a plethora of abuse, outside of fantasy land.
If Hilton is claiming abuse, he needs to specify how he is getting it, because otherwise we have people just believing it based on nothing and shutting up people for daring to be sceptical or criticise. A screenshot of the abuse in messages (names of the abusers redacted) would be enough to demonstrate this. As it hasn’t been shared, I will not just assume of such existence of this ‘abuse.’