All people from time to time mentally return to the past.
No one has it perfect, so everyone has something to "catch on to."
But still, there is no need to indulge in regrets about the past.
Even if you have realized your many mistakes, have gone through a long path of self-improvement and realized where you were wrong, this cannot always guarantee a result.
Sometimes some things can no longer be changed because the right time has passed.
Sometimes we scold ourselves so much for making wrong decisions that we can become despondent and despairing. Then comes depression.
There is no point in putting your emotional state at such serious risk.
Sometimes, too much reflection on the past prevents us from focusing on the present moment. Therefore, truly important events can pass us by.
Of course, it is necessary to reflect. However, this activity should bring benefit, not harm.