some women are bored by "good guys" and are attracted to the "bad guys". many of those women know about the risk but they still don't feel attracted to the normal nice men so they always come back to the bad guy hoping that there maybe is one they can Change enough.
I know what you mean, but in this case this guy is not the classic "bad boy" style male template. If you see when they were together he is just a golf guy and Vika used to out-train him and was in better physical shape than him and seemed to have the power in the relationship.
To me the situation seems more like he is a nerd, and he has become really bitter and passive aggressive and hiding behind the legal systems to punish Vika after she broke up with him.
I do get what you mean about "Bad Boys" and also "Bad Girls", though. Many people are attracted to this dysfunctional character type for all sorts of reasons.
Vika seems to have been more attracted to goofy, nerdy creative type guys in the past, who are maybe a bit wacky or fun-loving. This guy seemed like another of those until he has turned very vindictive with the custodies and separation. Very disgusting behaviours.
Her dating history are people like Redfoo, Monfils and these sorts of quirky guys normally.