Actions and decisions have consequences. I have been thinking about that in particular regard to a childhood friend of mine. He had a bright future the day he was born, but squandered it with poor decisions.
I regret none of my decisions, literally, given the way things turned out. I suspect others in my life do not now feel the same.
Even decisions which seemed dumb at the time turned out to be for the best.
There are no dumb decisions, just learning opportunities. Alas, while some people live and learn, some people just live.