I had braces in my teenage, but now in my thirties, my teeth are misaligned. Why?

There is a whole generation of people who wore metal braces in their teenage years, but they haven't followed the post-treatment guidelines such as wearing a retainer.

Retainers are designed to keep your teeth in place, choosing to not wear them for a long period of time will cause such issues. Unfortunately, for many people, it’s too late for that.