He is indeed very confident and determined. It's impossible for him to feel inferior or defeated just because of a few words from Situ Xuan.
If he really cared about what others thought, he would have given up back when his father was strongly discouraging him!
But he didn't, because he truly loves music and respects others, so both music and people would give him the same in return.
Although he may seem aloof and proud, in reality, he is striving hard, even in difficult times, for his fans and those who love him.
On the other hand, Situ Xuan, who appears to be courteous to everyone, is the one who views people with bias and truly carries the so-called aristocratic superiority. His courtesy and generosity are just a façade, while internally, he is strong, arrogant, and authoritative, treating his subordinates as nonentities!