My Life is a Mess,I just want to Redo everything?

Your depression is mainly caused because you have regrets and you feel guilty. First thing remove the guilt feeling. It never helps anyone.No one has a perfect childhood. Many famous people had trouble growing up. But they learned through these experiences and attained success. The past is history. Focus on your present because that will change your future. Switch jobs or look at new opportunities. Be willing to take risk. You will see a difference.