Dad was the enabler

Maybe some of you have this problem, but I’m having a hard time not holding on to my dad. He was always the enabler when my mom would be treating me terribly, he only intervened once when she almost put her hands on me. Other than that, he usually kept on the couch and I have vivid memories of me looking at him asking me if I’m crazy while arguing with my Nmom and him just shaking his head or ignoring me.

BUT, I also am having a hard time feeling extremely bad for him because I KNOW he isn’t happy being married to her and he is stuck in that house with her alone, now to be her sole victim since Nmom and I are low contact.

Any advice?