He admitted to clipping her nose during an argument, and threatening suicide (by far the worst thing he did, and a massive red flag).
The latter is known as "coercive control," and countless domestic homicides have occurred after such a threat.
It apparently worked every time, except for the final one, when Suzanne made it clear she wanted a divorce and didn't bite when he once again made that threat.
Suzanne told her best friend that this was a pattern (or it was in her grievance list), and he had previously attempted to jump out of a moving vehicle during an argument.
Suzanne also said that Barry had once held a gun to his head, and held her down.
Other than being a domestic abuser, controlling jackass, con man, sexual creep (groping and kissing a married woman, virginity conversation, etc), a proven pathological liar, and oh yeah, a killer, he's a great guy.