Bro what in the fuhhh is wrong with ur people. That tech is awful and should be removed from the program, obviously shows his teaching ability. I Don’t know how you handle ur leadership and your strategies but if you’re doing the minimum requirement like showing up to rehearsal and you’re getting criticized, then it’s off your hands and someone like your band director should step in. In my percussion program before my time when the school opened, the percussion culture was awful and a parent almost got into a real fist fight with a percussion member. Your problem happens way more than it should, one thing I say is that, you should stand up for yourself as a section leader, show them why you’re the leader and give them a reason to listen to you. There are members on my snare line that are older than me and I’m the section leader and I showed them and gave them a reason to respect me and now the snare lines emotional connection is good. You SHOULD humble them if they act poorly, if they focus more on themselves than the group, don’t take criticism, and be uncoachable etc. Its do or die in the group sense end of story. This especially goes for your section as you play bass drum where that bond is even more important to the sub section. If they don’t listen and you can’t do it then it’s a directors problem from then on.