While you build this complaint, are you planning a potential exit? It sounds like you are being pushed out by your negative experiences there. If you take a stand, it will likely cost you the job with how you describe the environment.

Do not let the repremands cause you to second guess what you know. You haven't offended anyone else, so bring some boots to stomp on the eggshells when some B throws them in your path. If you are right, and prepared, there should be no regrets. That is my strategy these days.

I got in a heated, almost shouting, expletive laden argument with my new manager early on over emergency situation policy. Then when an emergency happened and all the things I warned him about occurred, he quietly implemented my recommendations. Currently, he treats me as if I am in management, which is awkward but a relief at the same time. It can be surprising what holding your ground can do. Even if it gets unpleasant.

I hope venting here allows a little bit of relief since there is no easy way out of this one...