I feel resentment towards my successful younger brother
How did this bad blood start?
You should know I'm very serious about this resentment. It started since he was a kid.
It is ok to be jealous of your brother. Just try to turn this jealousy into something positive, like motivation. He seems like a great role model!
Being a success is a heavy burden. Parents are supposed to get it. If I was successful, I probably wouldn't be stuck at school and would be out in the world.
The best time to start your success is now, and if not, then tomorrow! I believe your brother is rather someone to be proud of and to look up to. How about taking him as inspiration, so you can achieve great things as well, because jealousy won't get you far.