Censorship, beyond what’s required by law, is doomed to fail.
It turns out they were mostly right (at least the decisions were the best possible with the knowledge of the time). Vaccines were effective against infection at the time and became less so with new variants (still a very good idea to reduce illness severity and likelyhood of hospitalization), lockdowns had some side effects but all in all saved lives before we got the vaccine, and the like.
Now that misinformation is less harmful than before thanks to most people having some immunity, it's less controlled and more people start believing the misinformation to be the truth.