As a centrist, I don't believe there is anybody on the Democratic side who will ever ever fight for me.

That's because you wrongly believe that Democrats only fight for "the trans people and the Black people and the lawbreaking illegal immigrants" - ignoring all the other fights they engage in, like fights for clean air and clean water and better access to health care and fighting monopolies and promoting labor rights and reproductive freedom and a host of other things.

I mean, it is ironic that you simultaneously claim you cannot pigeonhole people, and then proceed to pigeonhole "all you leftists" as believing certain things. Perhaps if you also tried to understand the breadth and variety and political positions of all the people 'on the Democratic side' to the degree you think they should do that for centrists and right wingers, it might help you get a better handle on things.