Mostly when you know someone who is a lot better at drawing than you then you think they're older but then they end up saying that they're like... several years younger than you! Happened to me three times! Too lazy for grammar. Being stuck in Science class isn't helping. I said then/than and you a lot ;v; woops
I get kind of annoyed if there's like, an 8-year-old who draws better than me, yeah. But if the age difference is small, like 1-3 years, I don't mind at all I'm more bothered if somebody draws really horribly (like something a 5 year old could do with fat crayons) and they're relatively famous within their drawing "section"/topic :I Though I've only come across that once or twice... [not mentioning names..]
To be honest, yes, I can get very jealous at those kind of things. But I would usually try to counter that by reminding myself I draw better than some others and that I would be in the same situation and the fact that I don't have the trait or family genetics that are successful in art; wasn't born with artistic ability.