[raxxorrax]

I don't think a union is a vehicle against unloved management, it would just be piling discontent on people that were singled out. If you believe you can make the case your manager works against business interest you should talk to him about that first. If that doesn't net results, you can talk to his supervisor with a reference to the meeting you have had and what you were talking about.

I agree on the noisy work spaces. That could be a union issue indeed. Maybe the problem of living costs too, but this has probably numerous reasons and it would be difficult to get everyone behind a common position.

Everyone has biases and it is okay to have some for that matter.