All contracts are negotiable, you did nothing wrong other than not having a conversation before wasting paper, the main issue is that for most people the negotiation is "if you want to work here you have to agree to all this."
But yeah reasonable accommodation and mutual understandings, etc, should be written down and signed. I challenged the non-disclosure agreement at my job once because it literally said I couldn't talk about my work with ANYONE, and a plain reading of it would mean I'd be unable to even talk to my boss about what I was supposed to be doing. It was poorly written and probably unenforceable. My boss didn't like that so I signed it anyway and then focused on finding work elsewhere (he was a dick and his company got raided by the FBI a few years later)
Being laughed at for how your body is is one thing, being laughed at for buying a fascist's ChildishCompensationMobile is another. It's a choice to buy Jeff Bezos' $100,000 Dick Mobile and drive it around like you're cool, it's another to... try and exist? As best you can? Corporeally?
Like no I don't need to worry about the feelings of anyone who gives Trump money and allegiance. They made bad choices that materially affect me (how many Twitters can these guys buy up and turn into a KKK Safe Place with this money?) and I can tell them they suck for it. Completely not the same as giving redheads swirlies.
Like, for context I also give distainful looks at poor drivers in BMWs and Benzes: obviously money didn't give them sense. So yes I'll laugh at anyone giving Musk money after knowing his true colors.