It likely all boils down to what drove them to get good at art. If they did it just for fame, recognition, and possibly money, that's probably why and how they got to be the way they are. Rather than creating something to bring their imagination to life and inspire others, they did it for ego food and now they think they can put others down as a way of making themselves look better. Someone who is good but humble will recognize that they weren't always good and will know it took a long road of practice and commitment to get there, and that there is always still more to learn and experience. They'll also understand everyone goes down that same road and everyone is at different stages of development but everyone wants to get better. That's never something to ridicule, because while someone may be better at someone else in one particular field, that other person may very well be better than they are at something else. Plus you never know. The one who was once just a newbie may one day overtake the former masters. NEVER underestimate someone else's drive and desire to excel at something, because that can be a big, royal butt-kicking in the future.

"Work for a cause, not for applause. Live life to express, not to impress. Don't strive to make your presence noted, but just make your absence felt." I don't know who wrote that quote but it's beautiful. That needs to be written on their faces with a permanent marker. Jigglypuff style. Hopefully one day a great and very nice artist will humble the heck out of them. But if not, evil tends to turn on evil. They'll eat each other trying to compete with one another for their own individual fame and attention. It'll be their own undoing as they claim and take away from one another rather than work together to grow as a community. Eventually their true colors will come out and it'll be anything but pretty. In time, people will take note and they'll need to adapt and learn from their selfish mistakes or it'll take them down the loser's road where all backs are turned on them and they just fade into obscurity.