I'm still relatively mobile - but totally understand your frustration. My mom was in a wheelchair most of my life. I find myself wondering at the rude people - and find myself wanting to strap the people who develop these "accesible" restrooms to a wheelchair and see if they have any success navigating!
It still reels my mind that some places would put the changing table in the HC stall.

There are some new soap dispensers around here where you have to push at the top of the thing to get the soap out. How in the world is someone in a wheelchair supposed to reach that????