One thing I’ve learned about feelings of sadness and anger are just that , feelings that you don’t have to act on.
And if you do act on them you can do so in an
appropriate manner. We always guilt trip ourselves into constantly thinking
that things should have or could have been different. The fact is that life is what
it is and we have to deal with it the way it’s dealt to us.
You’ve done your best , let it go at that.