Observations, in no particular order:
* Claire's hairstyle this season was AWFUL. It didn't frame her face well and was way too flat. When you don't even enjoy the basic act of looking at the main character, that's a problem (and I never imagined Robin Wright, of all people, could be made to look unattractive).
* Stamper's arc made no sense. He was out, then he was in, then he was out, then he was in, ad nauseum.
* The Shepard son's arc made no sense. I kept waiting for the reveal that he was Claire and/or Frank's child. Otherwise, why have him in there at all?
* Claire acts like a total recluse and basket case, then somehow feels betrayed when the cabinet pulls the 25th Amendment on her? Whatever, show.
* Did anyone else notice the final episode's opening credits had a very fake-looking statue of President Hale shoehorned in?
* Speaking of which, Claire's reverting to her maiden name came out of left field. Was this just their way of crapping on Spacey a little more?
* So Durant faked her own death to...do what, exactly? Record a bunch of damning crap against the Underwoods in a way that would make it super-easy to bury? I spit on your writing.
* Just like the HBO series OZ two decades ago, HoC started as a near-perfect story with a beginning, middle and end (8 episodes for OZ, 26 for HoC). But then it became a big hit, the network backed up the Brinks truck, and the writing staff kept tacking on increasingly desperate and ridiculous plots which were only marginally saved by the show's awesome cast. The result: both series wore out their welcome long before the plug was pulled. And so it goes.