You’ll know you’ve done well when people you trained start beating you. Be glad when they do.

Teaching somebody properly means handing over the exact thing that made you better than them. If they beat you later, that is not a hole in your position, it is proof the handover worked. Your chest will argue otherwise, because pride reads being passed as losing. It helps to decide in advance which of those two you are going to believe.

If you are the older one on a team or at a job, pick one thing you are good at and show somebody the real mechanics of it this week. Not a tip, the actual method. Then say something out loud when they get good.