To know true peace, you must forgive everyone...no matter what they've done...a hardened heart will never be peaceful. You will be stuck...a part of you closed off...a wall around your heart...judgement will suffocate your ability to love.
If there is resistance to forgiving, look deeper...it could mean that you haven't forgiven yourself for something...when you forgive yourself, forgiveness for others comes more easily.
Judgment of other's is a mirror...hold it to your face...look closely...what are they showing you about yourself that you don't like...you are still angry at yourself for what...?
It's time to move on...let the past go...forgive yourself...you did the best you could at the time...we've all made mistakes...some small ones, some BIG ones...it's okay...sometimes the only way we can improve on ourselves is to make those mistakes.