@msolga,
How did I actually survive at age 15 & onward?
A combination of dumpster diving, homelessness, night-shift janitorial work, living in cheap shared-accommodation, taking the bus, very careful savings, strict goal setting, voracious reading of any and all books I could get my hands on, and seeing number of my friends self-destruct via drugs & alcohol etc.
Do I have anything to do with either of my parents now?
Both my parents are dead, and I am not unhappy this is the case. However a few years before they died, I visited them (separately as they had been long divorced and would not see each other) and told them "I forgive you". I did this more for for myself so I could rest easy going forward.
Nonetheless, if I'm at home, and it's quiet, and I'm alone, and I have no distractions; I may find myself becoming bitter, angry, frustrated and self-critical, and it can take time before I realize the underlying cause is not a lack of humanity, success, abilities, intelligence, education, material wealth, etc on my part, but hauntings of a best-forgotten childhood.
I can also say that it took many years of careful undoing, and thoughtful introspection to reduce at least some of the damage caused by my parents. Simply writing this text brings tears to my eyes.