Is it normal to not have realationship with my family at age 40+

I was adopted at my teen age year. Parents have few kids of their own and also adopted few other kids fromr all over the world. As for me, me and my family didn't get long during my growing up years. It was nightmare for me. Now almost 15 years, me and the family hardly spoken or seen each others. When we do communicate, we just end up hurting each other even more. I personaly don't want to deal with them anymore. I want to move on with my life. Is it normal, that I dont want to deal with them anymore and don't feel guilty.