Like they disappoint you with their actions. For eg ang kong siao or always get into trouble or not nice to you or chao kuan character. And felt like bo bian still your own flesh and blood and have to accept him/her but deep insai really think he is a disgrace and if you had knew you rather abort the pregnancy.
Seriously, do you have any kid yet, or you're just posting this while in the fit of anger? Chill for a while first...
I know myself very well, and whom my parents are comparing me with. I abhor that. I have my dreams, my goals, my own plans and I have the confidence to pull the whole thing off. I had clashes with my parents a few times for insisting going my way, especially with my father, and had jiak lots of humble pies. In the end I'm more distance towards my father than to my mom.
Now that I have my ah girl and ah boy, I try not to dictate how they plan to go about their lives as long as they don't endanger themselves or disrespecting us as their parents and providers.
tl:dr - stop measuring your kids to the standards you hope for yourself. Refrain from agonising them for not meeting your expectation, and be glad that they're healthy and are hopeful for their future