Is AUTHOR wrong in the post ? POST : Sorry for any formatting errors or grammar errors, I’m on mobile.

BUT we have a close family friend, I’ll call her E, who has been in our lives for about 10 years now, but has of course always been closer to my parents, and seeing as I don’t live with them anymore I don’t see her anymore so it made things a bit easier. But I had always looked up to her and wanted to hang out with her and seen her as a role model because she’s really smart and motivated and genuinely a good person. 
But about 5 or 6 years ago now (i think I can’t remember) she started seeing this guy I never liked. He was here illegally and was clearly using her at the beginning and had a severe drinking problem and 0 personality and she was practically running his business for him (getting him clients, taking calls, setting things up for him.) She would constantly argue with him about his drinking and would cry on the phone with him if she was over because he wasn’t putting in the effort to keep his business alive and was generally taking advantage of how much she was willing to baby him. As if all of this wasn’t enough the came home to her one night and strangled her so hard she thought her life was in danger so she ran out of the house and called my dad sobbing, so we went to pick her up. She had bruise marks on her neck and was clearly shaken and stayed with us for weeks before she went back to him because they went to church and prayed together. My attitude immediately soured and I started to realize things I didn’t like about her. I felt hurt, and frustrated but I was only 17 at the time so I was in no position to tell someone that was almost 30 what to do with her life but I couldn’t help but feel betrayed in a weird way. As time went on I realized she was just making excuses for him, would make backhanded homophobic comments and both her and her now husband would be standoffish at best with me or downright rude with me if i was at my parents house the same time as them.
My parents think I’m an asshole for not wanting anything to do with them and for leaving the house if they’re coming over with their kids, but I’m still angry at him for ever laying hands on her no matter how long ago it was and with her for staying in an abusive relationship. Am I in the right here or should I try to mend this.