Davey screwed over people far worse than anyone else on the show

The biggest victims of his gambling addiction were his wife and son. His wife lost her store which was her father's, not to mention her main income and probably house. His son lost the chance of a bright future by not going to Georgetown and now has a lot of mental trauma from his dad fucking over his family and then bailing on them for good. Vic was absolutely in the right to tell him to stay the fuck away from his sister and nephew once he graduated.