In any case it's the users who built these companies by using their platform. It's users who need to rally and migrate away in solidarity with those being banned or whatever it may be. I'd say expecting companies to not do whatever they consider is in their best interest is what's not reasonable nor realistic. A company exists to make money; if banning certain users advances that mandate then it's free and expected to. Again, unless there's some legal basis to counteract that decision.

It’s hard to wrap up the past couple decades of tech building out their utility-like selves, showing how it breaks a heuristic of “it’s their business-just don’t use it”, so I’m impressed how well you’ve done it.

> do you not feel they have a responsibility to be fair, reliable and trustworthy?

What an odd question. Of course not. You've built your business on their platform and you've (for lots of non-specific, general "you"'s) decided to cede your business to their whims. Plenty of businesses exist just fine with no social media presence and plenty of people are not too brain-rotted to find them.

But more to the point, I don't feel Meta has any responsibility to anyone. I feel the government in my country has a responsibility to regulate them and to levy devastating and potentially existential fines if they break those regulations. It's absurd to think these companies have any obligation to you (you in general, not you specifically) just because you can't figure out how to function without them.