Gotcha.
It also could be that Yaz may struggle with interaction with other people in crowds. He could have some sort of disorder that just makes him uncomfortable receiving attention from strangers.
A lot of times I feel bad when famous people are considered jerks or stand offish for not being graceful in every interaction with "normal people". Like you said, everyone has bad days sometimes, but also too, a lot of people struggle emotionally with fame and receiving attention and praise from strangers, and it comes across as intentional dickheadery when it might be an emotional social struggle for them.