Starting to resent my parents

I feel like I am starting to resent my parents. They would always fight when I was younger, and they still have random fights now. I realized that this really impacted my mental health, stunted my growth as a child, & I still have ptsd from this. My dad would also swear at me & told me to go die multiple times, but it really hit me when he said it this past fall because he really said it with a lot of grit so I think it hit me harder. After fights, my family sort of pushes things under the rug & moves on. We’ve always done this, but for some reason I am not able to forget the last time my dad told me to go die. I pretend like I forgot and moved on from it in front of my family because I don’t want to cause any more trouble by bringing it up. I just think that I’ll always remember this and don’t know how to move on from it. With tomorrow being Father’s Day, I bought him presents to celebrate the day but I feel like in the back of my mind I will always remember him telling me to go die. How do I move on from this & not let this impact my life? I also want no part in my parent’s fights. How do I not get involved in them while also not letting it affect me when they fight? I’d appreciate any advice!