I get your gripes. For the longest time The Devil and Karl Marx was one of only a handful of Communist related books in my local library system (and by far the most checked out). The city council and board of trustees even made successful efforts to censor Black History and Pride Month events and displays this past year.
That being said, we do have allies and even comrades working within the system as librarians and aides. The ones in my city managed to help me get Blackshirts and Reds and The Jakarta Method onto the shelves.
Libraries being one of the last remaining third spaces of public life will definitely be a zone of struggle as market interests seek to hollow out and privatize the ever diminishing Commons, but there’s solidarity to be found despite how bleak the situation seems.