The tumblr/instagram that documented all the evidence suggests he definitely did take advantage of minors. And I think you're too kind to him about Heidi being the abusive one - multiple people who knew them both very well immediately sided with Heidi based on Jared's behaviour towards her and none of them believe Jared's "we were both bad, but she was worse!" Defence.

Idk I don't think he was ever malicious in a pre mediated sense. Just a fucking idiot who didn't know how to deal with another person in his life who had opinions and ideas of her own and a life outside of him. I think that led him to lead a shitty destructive life that brought them both down in misery.