A recent letter writer opined at length about Fox News being on a TV at an establishment she was visiting. She obviously hates Fox News.
Just a few points here:
The business, as you do in your home, has a right to have their TVs set to whatever station they want.
I doubt they can afford to hire a person with the title "channel changer." If an establishment's employee changed the channel for every person who wanted to watch a different channel, I doubt that employee would get little else done.
Here's a novel idea -- don't watch. I go in places of business all the time that have stations on that I don't watch at home. I simply don't watch.
But that takes self-restraint, and it's also called being tolerant of others even if they don't agree with my point of view.