Most people don't seem to understand what the problem is because social media is a circus sideshow for them so they don't see the censorship, while those whose opinions align with those doing the censoring really don't see what the problem is because they can't imagine the tables could ever be turned on them. It isn't until some weird south african guy buys Twitter that suddenly it dawns on people that maybe the rule of law exists for a reason... but only insofar as respecting the rule of law protects them, of course, and not their opposition.
This isn’t really true though, the left has always been concerned that social media censors them, and why wouldn’t you be? Speech is power, and the left is all about promoting their own ideas(not uniquely so, just pointing it out). in fact the left often thinks that even before Musk, social media companies have leaned right. This idea that the left loves social media companies is a right wing narrative. We can talk about whether or not it is true that social media has a left/right wing bias; I’m not necessarily saying that the left doesn’t think social media should do more to fight hate speech (which may disproportionately impact conservatives) but painting the left as loving social media before Musk is just fantasy.