I’m not sure I understand your Ms. reference since that is what I go by (in part because I didn’t change my name when I married)and I find it to be alive and well in the world. Miss is what little girls are called and it continues to carry a dimuntive “I need not take you seriously” air. (as in “Little Miss Muffet). Mrs. has a lot of ownership baggage for many people, although if women want to use that, they absolutely should. Ms. is a reasonable accomodation between the two and I would actually view it as an example of how forms of address grow and change as is needed.
Your trans people/bathroom comment is a somewhat cavalier response to the very real physical dangers that trans people face, particularly when they need to follow the call of nature — something which they cannot avoid. It’s not some political statement they are trying to make so much as it they are trying not to get beaten and killed.
If your name were Fernando and I insisted on calling you Fred in an institutional setting because I wanted to harass or demean you, it would likely be a violation of existing codes. Not applying that in this other instance is just more of the same thing. I also think that both Trump and Peterson would have found their way into the public consciousness one way or another so to blame trans people for that seems disingenious to me.