What if I end up becoming bitter and psychologically damaged later on in life?!

Even after I leave the family household and start living on my own, I am not sure any amount of professional counselling or mental health therapy will help at this point. One day I will end up taking these deep-seeded personal issues and projecting them onto others, I also won't be able to cope with life anymore because of the psychological damage done to me by many decades of being exposed to toxicity and negative energy. All I've done throughput today is tread on eggshells, having my parents snap at me constantly for one small thing after another, when my mental condition is already getting in the way of life and everything in it.