The kid younger than you who’s better at it? That’s not a threat. That’s a free teacher.

Someone younger being ahead of you says something about their hours and their circumstances, not about your ceiling. The reflex to feel threatened is normal, and it is also expensive, because the person who can do the thing is standing right there and is usually happy to show you. Pride turns an available teacher into a rival for no gain at all.

Ask them how they do it, without the joke that protects you while you ask. Watch closely and copy one specific thing. Being taught by someone younger costs about ten seconds of ego and saves you months.