Disrespected

When I was in 8th grade, I had a friend who was popular but actually was hated by most of the people secretly. I remembered that day that he invited me to join his band as a lead guitar player. Well, at that time, I agreed and joined the band he grouped, however, that was before I knew his actual ability. My friend who invited me to his band, was the bass player and vocal in the band. Well, he couldn't play bass well since he didn't even know how to hold a bass, he couldn't sing really well, neither, because of his serious out-of-tune problem.
One day, My friend said that he is the best in the band, and the other players were all worse than him, in public. The people there all agreed with my friend, but actually, they all denied secretly. Why didn't they tell out the truth? Since my friend, who said that he is the best, was angry easily, there were lots of people having a big fight with him -- including the physical fight using fists, -- however, the people who had fought with him were badly injured, and the rest of the people, who haven't had fight with my friend YET, didn't want to fight again. Well, I couldn't watch him keep being arrogant and lying, so I had a big argument with him. He was angry and curse that I can't even play instrument better than him but criticize his ability. At first, I didn't feel disrespected, however, the people around us were asked by my friend that did he play better than me or not, and those people all said that I play worse than him, and I felt extremely disrespected and mad. Suddenly, I felt disappointed that the people didn't acknowledge my ability but conceal it although they might know that I absolutely, 100%, played instrument better than him. And this seemed to be very personal to me, so I felt very mad and almost had the fist fight with my friend and the other people, moreover, those people were my sworn followers, how could they do such of things to me? I felt disappointed, mad, also heartbroken.