made my interface hard to navigate

How? What is hard to navigate in Plex?

try constantly to shove their own content down my (and my users) throats.

I assume you don’t know you can customize your home screen and menus? You can only have your own content showing if you want.

You can’t say their service hasn’t gotten worse though :)

I absolutely can. It has only improved since I’ve been using it, which is from the very start.