We've already had actually nil transaction costs for micropayments to eliminate ads offered by Google and... nobody used it. If advertising is driving facebook/twitter/youtube/etc to prioritize content that angers people then micropayments to support some small blogger isn't what is needed. Instead, what is needed is for facebook/twitter/youtube etc to operate on micropayments.

But... advertising isn't why these services trend towards angering content. Engagement is why. Whether you are paying with ad views or micropayments, if services want you to keep engaged then they will be incentivized to promote this kind of content. And since things like youtube premium (or whatever it is currently called) exist today and per-view payment systems have been set up by Google in the past (and already died), I don't think that funding these websites with BTC donations or whatever would change a thing.