"I don't like the content that ends up on + promoted through algorithms on Facebook, therefore, they should be responsible"
It's not their content, and they aren't the ones engaging with it.
They are pushing it because users post it and then engage in it.
Say we got rid of Facebook tomorrow. This exact same problem would happen at another company/platform unless there was heavy intervention/moderation (which to my understand, Facebook absolutely already does some level of moderation?). What's that equivalent to? I'm not a "free speech advocate" or anything like that but what you're asking for is censorship instead of asking users to bear the responsibility of the content they consume.