I think I relate to what you said. I laughed the first time a therapist told me I was a perfectionist. I knew lots of perfectionists and I was so far from perfect...
I was told I was the most extreme kind, so perfectionistic I wouldn't even try most of the time. I also learned that I,however unknowingly, expected the same high standards from other people. It is hard to accept oneself or other people with such standards. I ended up isolating myself most of the time so I could try and escape my own expectations and not be continually disappointed by others. I have to work hard to not keep slipping back into perfectionism.