My son used to say similar things when he was in grade school. He was particularly annoyed by loud noises and loud kids. He took it on himself to be the enforcer of quiet on the schoolbus, even though no one asked him to and he wasn’t really capable of enforcing anything. I was worried he was going to get in a physical altercation. At a minimum, he alienated himself from the other kids. I suspect now that he was overwhelmed by the noise and didn’t know how to handle it. I think it may have helped if we had taught him to withdraw from the situation or given him headphones to wear when he couldn’t. I like the advice Penny gave here.