So she's allowed to yell at him and accuse him of stuff when she can clearly see it's the teachers coming up to him and forcibly dragging him off but he can't do it back? If you can't take it don't dish it out.
Like someone brought up last chapter, He was able to hold his ground and tell off the others before why did he suddenly lose his nerve and be unable to do that now? Like him losing his backbone all of a sudden is what caused this in the first place.
Me when they get interrupted by the other senseis: " - Come on, let her talk... " Me when they get interrupted by Meka-chan-sensei: " - There are other senseis than our shortstack goddess? "
I mean she saw the others coming up to interrupt. As their coworker she should have been able to as and adult and teacher to tell them to leave and wait until she's done talking.
And her interpretation of the scenarios is so off kilter. Maybe see it as them bothering our mc and that's why he's struggling.