The thing is Sean actually has a point.
These are grown-ass men that made those choices - Izzy as an adult had some questionable interactions with dogs; DDP as an adult let his coach kiss him/rub his crotch; O'Malley as an adult let (past tense?) his wife sleep around in an open relationship.
Meanwhile the comeback from DDP/Suga is that when Sean was a kid his dad beat/raped him, which is beyond fucked up - he was a kid, he had no choice in the matter. They are welcome to make fun of him for it, but there's a clear distinction between trolling someone for their choices as adults and horrendous abuse they suffered as a child.
That's what happens when you don't have any "real" comebacks, you just go for the lowest hanging fruit possible to get a reaction (i.e. Colby going after Leon's murdered father). I guess that's the current state of the game though, dudes would rather have the last word no matter how despicable than let someone talk shit to them.