“Garbage person” is a bit harsh, but he is a troll and knows that being a troll brings him the clicks, which is why he does it.
I don't think "garbage person" is a stretch at all. Omar boasted about shooting at someone and said he would have killed that person if he had better aim. And one of the most notable things he's done in the past decade is befriend a player's wife who outspokenly bashed her husband's teammates and Omar was right there for all of it like a gossip queen.