What is your opinion on the current post-truth politics backed by ubiquitous social media? I am at a loss when figuring out how to even work towards meaningful

What is your opinion on the current post-truth politics backed by ubiquitous social media? I am at a loss when figuring out how to even work towards meaningful change in an environment where that messages are viewed / liked / shared is the only important thing, and the relation of that message to physical reality is completely irrelevant. And I have the feeling that in general, software is part of the problem, not the solution :-(