The main issue is being instructed to comment upon my own performance and achievements. I am not a dream employee, a rockstar over-achiever. Nor am I useless tosser - just an ordinary person doing an ordinary job.
Most of my job is boring and utterly pointless admin that adds no value and I hate those parts - and in my book that includes appraisals.
If I am not doing what I'm supposed to do the the required standard I expect my boss to tell me, that's part of her job managing people. Otherwise I'd like to be left alone to do the job as well as I can. But no, some git has designed a process to torture me.