I have never met anyone who ever thought their parent was especially good, at least once you get beyond a surface level interaction with them. We are all critical of our parents, and we should be, that's how you grow.
Folks who blame their parents for their problems however, tend not to grow and be forever stuck emotionally seeking satisfaction from the parent, or surrogate parent figures.
I meet many folks who had objectively better parents than me, who are convinced their parents are far worse than mine, and I was the one who had it better. Blows my mind, but you know, victim mentality and all that.
Met someone a few months ago who went on a rant about how their parents 'forced' them to become a successful person, and how they wished they could have been a slacker... and then told me I was a slacker and how amazing my parents must have been because they didn't support me through college and graduate school financially... it was just like ... OK there, you insane person. Yeah, you're dad investing in you and supporting you and encouraging you to become independent and wildly successful in your life is... is clearly child abuse
Also been told my folks are abusive and shitty parents for not paying for my college, buying me a house, etc. and they should have never have had me if they couldn't afford those things for me... right.