He’s never really made a dig at her publicly like she has him. Like he’ll the reason it was known they were split way before it was announced was her shady likes and such online. She’s a mean girl and can’t help herself. She’s made little digs here and there regularly and downplays Gary’s role in the kids lives constantly (like the Mother’s Day stuff, always posting like she has the kids when he does, and these digs about their relationship regularly). I definitely can see him as not a great partner, can definitely see him as even cheating. But I also can’t see her as a treat to be with. We all saw how isolated she made him - not just from friends, but his own family. Everything after the split though just speaks to both of their general character outside romantic relationships and man does Emma have a lot of room for growth. Gary may be a tit partner (not that he’s saying anything to provide his side), but at least he doesn’t try to be tit generally.