I have made a very good contribution in my PhD and just graduated two years ago from a top university with honors.
Today, I revised my PhD manuscript and surprisingly found several grammatical errors, informal sentences that I don't feel comfortable with now, and honestly also found two technical errors (they are correct in my published papers but not in my PhD manuscript). I am really disappointed, and feel like "I don't deserve to be graduated from a top university" with a PhD manuscript that contains a lot of grammatical errors and several informal things.
When I wrote the manuscript, I was happy with the informal things I added, but today I feel really sad by having them in my manuscript since I think they decrease the reputation of my work.
Although that after my defense the committee gave me one month for the minor corrections, but I don't think I have really benefited well from this opportunity. Is this normal? Any suggestions?