I feel you. My parent are same way. The constant comparison and criticism has driven me anxious and depressed. I am from Pakistan, and this is pretty common for our community.
The worst part is that they went above and beyond for our education. So now I constantly hear about how they sacrificed their pleasure for us and how we are so ungrateful. They complain that I cannot take a little bit of constructive criticism. Which makes me feel even more guilty. Perhaps I am too sensitive.
I am pretty successful, more successful than most people my parents are actually friends with. I support them financially more than most of my friends. But, of course, that's not good enough for them. Lately, my mom stopped talking with me because I defended my son against their criticism.
In our culture, parents and elders are like God, we are not supposed to say anything back. From childhood, they start programming our heads with stuff like children owe so much to parents, there is heaven under mother's feet, and a lot other such sayings.
I have been to therapists for this and they all recommended that I distance myself from my parents but this is something I just cannot do. They provided food, shelter, the best education. They were there, it is not like they abandoned me. So how can I leave them.
There is a lot of support and literature about parents who abandoned their children or were physically abusive but you don't hear songs about parents who emotionally abused their kids. I don't know how to deal with this.