You would also be censoring people if you ran an upscale restaurant with a dress code and standards of behavior, or if you didn't let them post ads on the walls.
As long as you make your rules clear and enforce them fairly, censorship and standards of behavior are completely fine.
The very large social media platforms all market themselves as being neutral. They got to be the largest by providing a space for everyone.
So the ask here is "please enforce the rules fairly the way you have always promised you would." Asking a business to deliver on the promises they've made and continue to make is not an entitled attitude.
After all, all these businesses are in complete control of what they promise. If they don't like the old promise, they have a first amendment right to make a new promise that suits them better.