Both in my case. My brain was already defective before birth, then birth trauma came and finished ruining my brain. My childhood was decently good despite not having a father around me (it was a good thing in my case since my grandfather definitely was a better paternal figure to look up to). I had a grandfather which bought me anything I wanted, and I wasn't aware of my disorders yet, but things changed when he became sick.
With no more stable income and insane medical bills, the family was buried in debt, and everything started falling when he discovered he had cancer. At some point, my uncle (a mentally ill parasite) came to live with us and bullied me in a daily basis and increased our debts by contributing with absolutely nothing at the expense of my grandmother and my grandfather's money while contributing with my anxiety disorder and low self-esteem. Then my grandfather died, we had to sell our house to pay for the doctors for doing nothing useful, my mother became depressed, we started moving on rent houses throughout the city with my parasite uncle following us, I stopped talking with my only friend, my lil' brother became a demon, I started realizing the extent of my disorders and started becoming hopeless, at some point everyone started treating my brother better than me, my mother divorced my father (that's a good thing, though), my parasitic uncle became a religious fanatic and made my mother force me to go to church, and it goes on...
Now we're on our tenth or so rent house because we can't pay our bills in time (because of my parasite uncle) and we are eventually kindly asked to look for another place to live by the owner of the house and everyone is against me because of my lil' brother, but at least something good finally happened, but it is not going to last long: my parasite uncle was arrested and is in jail, but of course my stupid grandmother is doing everything she can to free him so he can be back to pester us, but he better take care now and not dare to keep making my life an even worse hell than it already is. A person who has nothing to lose can be pretty dangerous to himself and the others.
Well, that was pretty long. If my memory of these events wasn't crap I could even write a book with all this drama.