You've learned and grown from what you've experienced in your life.
What if's...where do they lead? What do they give you? Any moment of anyday could have been different...but think if you had taken that road during that time that some horrible accident had occurred and had died in it...see?
I see no point in regrets in my life. Not to say I wouldn't like to have done some things better.
It is what it is, and I can make today better, and strive to daily.
Maybe a different path, a different life, and it would be YOU that you don't like these days. Maybe you would have turned out different--more selfish, for example. Whew! ARen't you glad you took the path you did?