I don't know if Jason was a victim or not-- relationships and divorce can be complicated--and Beth is definitely a complicated human being. And Jason allegedly went a little "cuckoo for cocoa puffs" during and after the divorce--so I'm not sure what the reality is/was.
As I posted before, I haven't really kept up with the show (but I seem to be getting sucked back in, lol), but Beth in the first few seasons referred to herself as the "runaway bride." She had been married for a short time, divorced, and according to her, engaged a couple of times after that (before Jason). So yes, I agree that she appears to have trouble with lasting relationships with men, unless something has changed recently.
Which is why I find Beth giving any kind of advice to Tinsley about the relationship with Scott laughable.