It truely hurts reading the OPs post, because I have a mom that is so utterly the reverse.
My mom can't stop saying son this and son that, but I am not such a dolt I can't see that mom is also 80 and has trouble with everything eh, she's not ignoring my need to hear 'daughter' and 'she and hers' in dialogue, she's just a bit old and a bit set in her mode.
Heck I have trouble editing the wrong gender out of my dialogue when referring to myself, so I can hardly complain if others do it without malice.
But my mom has made it clear, she's not going to stop loving me. I was her baby once. I am merely a lot older than I once was

But I have heard conversations like the OPs and it was for all sorts of things having nothing to do with sex gender or any of the issues of our community here. Some parents simply suck at parenting. And they likely think they are fine people too.
The most you can do, is not let them live your life. Not let their choices rule yours. Not limit yourself by their lousy example.