PBS and NPR have become very liberal leaning. They are no longer display or maintain any pretense of neutrality in their reporting.
You're not wrong about how NPR and PBS lean, but you may be wrong about when this occurred -- it's been this way from the outset. It's not something that just happened. The content of public broadcasting has always been heavily influenced by academia -- originally it was almost all opera and/or classical music, and much of it retains that format (and others have it for part of the broadcast cycle).
Influenced as it is by the "university bubble" where dorm-session social theories prevail, it has always had the socialist tendencies that originated there.
If anything it is somewhat better now than it once was.
Before he retired and also became "cancelled" Garrison Keillor, himself firmly leftist, frequently parodized the leftist environment of Public Radio in general -- this when he wasn't using that very outlet to disparage right wing people he didn't like such as Jesse Ventura who had the audacity to become governor of Keillor's home state.
Personally, I wouldn't mind. I listened to the local NPR station almost daily when I was living in the states, and probably will again when I return, so I wouldn't mind - BUT. I hate the quarterly lie festival/panhandling that is the NPR/PBC fund drive. "We are supported by only viewer donations." Not true, you can find a federal line-item for Public Broadcasting.
Being member of the center-right I generally like NPR programming, and quite enjoy Morning Edition and Science Friday, just to name two, but I know what I'm getting into when I turn on the radio, and sometimes I just have to roll my eyes and change the station.
I remember an interview with Terry Gross where she was interviewing some aging rock star who had written a book about his life in rock-and-roll, and she asked about a picture of him. As described, the picture showed him surrounded by a commercial amount of marijuana, with a revolver on the table next to him while he was rolling a joint. She asked him why he had the gun. Really? Here he is committing a felony (at the time) and you're asking about the firearm which is completely legal?
It's an example of the phenomenon which is somewhat endemic in public broadcasting.
And it always will be, even if the public funding were dropped entirely. All those "underwriters" like Intel Corp., the Price Family charitable fund, etc., are no more underwriters than Budweiser is an "underwriter" of the NFL. What they are is corporate sponsors who are paying either to support the left-leaning content or simply to have the "prestige" of being associated with NPR's reputed intellectualism.
It is what it is. I don't expect much in the way of balanced fare there, anymore than I would expect it on MSNBC or on Fox News.