I'm not sure about my judgements of Jake and Vienna. There's a lot wrong with both of them and they're very much alike so it's definitely not surprising they couldn't be together. There's never room for more than one narcissist in a relationship.
If what Jake says about what Vienna did (& I could definitely believe she is capable of all of it), then he is not the villian. If Jake did the things Vienna says he did (& I feel he is capable of it also) then he is the villian.
When you have this kind of situation, I usually believe it's a little of both "he says, she says..."
But personally, I think Vienna is more of the villian..........not that it matters who is slightly more evil than the other!