There are two types of regret in trading. You regret when you cut your profits and realize you could have earned more. And you regret when you don’t cut your profits and you end losing.
Which one do you prefer? I prefer the first regret because it doesn’t break your mental health. The second regret makes you take bad decisions in your next trade because you start think only in taking “your profits” back, aka “revenge trade”.
So to answer your question, yes I do regret but it’s a good regret from my point of view. As I just mentioned in my last comment, you can’t win them all. We must understand that to make profits. Hope that helps.