Wrong, wrong, wrong! Free speech is pessimistic as heck. It's saying that good ideas don't necessarily win, but if you allow authoritarians to engage in arbitrary censorship then bad ideas will always win. Censoring free speech is not just a "crude authoritarian's" move; it's what all authoritarians do whenever they feel they can get away with it. And censorship won't save you from propaganda either: there's a lot of crude propaganda in every totalitarian regime, happily coexisting with censorship of every other point of view!
Free speech is NOT a problem: it's a very real safeguard against critical threats. If you treat it like one, you haven't seriously engaged with the issue.