I know it is hard to see the bias when you are in the bubble along with them.
I agree that everyone has, by definition, some bias, but NPR/PBS tend to avoid editorialization significantly more than their counterparts.
I do wish they could do a 'just the facts' reporting as I think that is worth some taxpayer money to support. But by any measure, from any media watchdog, they were one of the most extreme and least accurate media source. That you can't see that says a lot more about you than PBS/NPR. Hell, there are 20 year old SNL skits mocking their coverage for its very narrow POV.