There are a lot of people who are unhappy with the steps the government took to crack down on COVID misinformation, and some people are still upset about Twitter's decision to limit spread of the Hunter Biden laptop story (which was entirely unilateral, and reversed within 24 hours).
Both of these took place in 2020, when Trump was president, but of course Trump's greatest coup was to make everybody think Biden was president in 2020.
Though IMHO it's not just a Biden problem, it's a "everybody in power" problem. They just can't seem to resist (ab)using their power to shape the conversation and censor their opponents. It's also not new, it's been happening for hundreds of years at least. But it did get a lot more brazen under Biden IMHO with Twitter/Facebook etc and admin officials telling private companies what to censor (err, "moderate").
This is your regularly mandated PSA that the quote about "yelling 'fire' in a crowded theater" comes from Schenck v US, which used that analogy to justify why the government could ban people from protesting the draft in WW1. It is not good law anymore, and has been fully superseded since the Brandenburg v Ohio case which limited the exemption to "imminent lawless action."
Read the links. It wasn't just that. People from the administration were actively talking with social media companies and telling them to take stuff down. At some points they even demanded it.
andy do you really think the Hunter Biden laptop story was equivalent or even close to "yelling fire in a crowded theatre"?
They didn't. Fbi told Facebook etc to be on the lookout for Russia pushing stories to influence elections etc, they didn't ask them to do anything specific. Bidens campaign did ask Twitter to remove nudes of his son, which already broke Twitters own rules. This is why the twitterfiles were a nothing burger.