I think we are in the same boat with the perfectionism. My DD (4 today) can read and has been able to since before age 2. When she is in the mood she will bring the books over and read to us, but the minute she stumbles on a word she is done. We haven't pushed her but I've wondered sometimes if I did push just a little would she get past this hurdle or would it cause more issues with her perfectionism?
I wish I could give you advice but I certainly haven't figured it out. Just know you aren't alone and I know your frustration.