I’ve been thinking a lot about why the fandom is so much more vocal about Gary hate than they are about, say, Bill Macy, who is imo the most despicable character in the series.
Apart from the obvious “this fandom doesn’t care enough about Rick Macy” angle, I think it’s because Gary is the less frightening of the two.
Think about it, what does Gary actually get done? Pretty much nothing. His attack on Amy in S1 is horrible but Amy picks herself up and carries on because she knows she’s better than him; his foul language in the pub backfires spectacularly when he ends up being choked by Simon; as close a call as the Blue Oblivion incident is, Kieren overcomes it.
At the end of the day, our heroes are stronger than Gary.
Bill, on the other hand, Bill is destructive. He might not achieve his ultimate goal of goading Kieren into a second suicide, but that doesn’t make the murder of his own son any less horrific.
Kieren is the only survivor, but he certainly hasn’t won.
So with Gary, unlike with Bill, we feel safe making joke posts about how much we hate him. We can bring it up all the time because we don’t have to think about the consequences of his actions because really… there aren’t many. But we can’t do the same with Bill because when we think about why we hate him we also have to think about what he did, and no-one really wants to think about that.