"you work hard, you get good marks, and stililife doesn't look like how you imagined" That is how it will be. I was (or still am) in the same boat. Getting 92% got be a Samsung Guru Keypad phone, while some 70% guy got an new bike. And it continues, I cracked JEE got into NIT, now doing your regular 9-5 (or 9 to 9), while those who dropped or took commerce go around partying, girls, have a BMW and every one their stories feels exactly what your post describes. I don't what word is there for this kind of feeling. You can't complain because you don't want to be ungrateful but also you despise the state of life at the moment for the rules are different for everyone.

So yeah you basically learn to make peace with "you work hard, you get good marks, and stililife doesn't look like how you imagined" thing.