I kinda know where you're coming from. I'm not sure if it's just an Asian thing, but my parents expect only the best from me. Especially when it comes to school and career. I call it tough love. My parents won't be totally satisfied unless I become a doctor. That's just not me, though, but I've learned to accept their mindset.
I resented them for crap like that when I was younger, but I've come to realize that they only want what they think is "best" for me. I mean think about it...what good does it do them how "perfect" you are or what you become later in life? If they didn't care, they'd tell you to do whatever the hell you wanted or just agree with everything you did. For me, I know they only mean well. They guided me, whether I liked it or not. My parents are getting preeeetty up there and I know all they really want is for me to be a better person and be financially stable in the end, regardless of what happens or what path I choose.
I have a big family -- five other siblings. Yeah, it sucks when they compare you to your other brothers and sisters, but they're probably just trying to "show" you what's possible. Maybe it's a standard of some sort to them. Maybe they compare you to your sibling who has "accomplished" the most because they want you to aim high and not settle for anything less.
Blah, blah, blah, I can ramble on for days about this shit.
In the end, you should ask yourself not why THEY don't appreciate YOU, but why YOU don't appreciate THEM and all they've done for you so that you could get where you are. After all, they didn't have to buy you a car, feed you, or done anything they've done up to this point. You should really take a step back and think about evrything from their point of view. Didn't mean to preach, just giving you my two cents and sharing my experience. I hope you feel better.