Right? Calling the parents to tell them "what a piece of shit they raised". Wtf? Like what did they ever do to you? That's petty and childish. 

OP seems to forget that while he left her financially fucked over, she let him do it and it seems like he didn't even have to try very hard to do it. While I hope she gets it all worked out, it seems like she doesn't want to take responsibility for her part in all this.