I heard once that if you cringe about your past it just means you've grown as a person
Where did you hear that? What do you think the reason?
I am a big fan of logic and I am also trying to avoid overthinking things.
It's normal to regret poor decisions in your past. You should always want to actively improve yourself.
Logic, yo. It's all about emotions and when you are done with your emotions you mature as a person. You will never regret feeling bad about something in the past, because you are always improving.
That is a very wise thing to say and I agree with you wholeheartedly!