I feel like a tough 50-something and it was hard won too.
My parent died when I was a teen, the remaining parent immediately moved on with horrible step-parent, infertility, issues with pregnancies and birth, marriage problems, issues with newborn and problems finding work.
I used to think I was flawed, damaged, and one stress away from a mental breakdown, but I held it all together and recently realised that actually, I am as tough as old boots.
At 50+ I no longer care what anyone thinks of me and am willing to openly pull people up on their shitty behaviour.