Me too. I had my first major meltdown (mental health breakdown, not a tantrum) when I was five or six years old. And my life went very badly thereafter.

I've tried to make the best of whatever I have, but I've fallen so far short of what I imagined I wanted, it took this long for me to accept that I wasn't going to have the things almost everyone else has, or do the things everyone else does. With acceptance still comes sadness. And grief.