I am pretty disillusioned with them too, and they do push an agenda in many areas (pro-military, anti-tech, etc). I loathe their opinion pages, they're a weird mix of bland and constantly pseudo-outraged. But I still like lots of stuff they create and a subscription isn't super expensive, so paying seems like the right thing to me personally. I'm just reading a newspaper, not looking for someone to marry. (I wouldn't want to marry someone who always agrees with me either, come to think of it.)
Yea I knock on them for the same reasons, but when the topic isn't of national interest, they have some excellent story tellers and reporters. Their digital remixes are great too (e.g. Snowfall and its intellectual children).
Nonetheless, as my perspective evolved, I realized I can't countenance supporting them when they endorsed actual evil like the Iraq War and perpetuate so many things wrong in society. They'll always let you down when it counts, so I don't see a reason to be there for them when it doesn't.