If you've spent a long time developing a skill and techniques, and now some 14 year-old upstart can get exactly the same result, you might feel a bit miffed I suppose, but that has happened forever. ↗
I never studied anything about film technique in school. Eventually, I realized that cinema and theater are not so different: from the gut to the heart to the head of a character is the same journey for both. ↗
And, you know, my dad would show me some things sometimes, but the best things that I got to do were to actually see really good players play up close. That gives you an idea of fingering and technique and what not. ↗