“Success” is a pretty blurry, vague, annoyingly relative construct. Asking someone to define it is just an exercise in tiresome blather, therefore I won’t bother.
What I will say, however, is that if you’re doing something the genuinely matters to the world, and you’re doing it surrounded by people who genuinely matter to you, you have few reasons to be ungrateful. Most people aren’t that lucky. So rock out if you are. Exactly.