I finally finished Iron Fist the other day. It took me a while, because life got in the way, but I finally got through it.
Overall, I enjoyed it. I think it's easily better than Luke Cage or Jessica Jones, but not up to Daredevil level. I'm a little over this whole trope of the evil corporations, etc., but I still enjoyed the story.
Danny is an interesting character. I don't know the comic book character, so I can only speak about the TV version, but I think it's interesting how he is highly skilled and trained in some ways, but completely developmentally stunted in other ways. He suffered a horrible trauma as a child and was immediately told to repress any and all feelings about that trauma. He was forced to live in a place that he was never meant to live in, and physically abused until he became what they wanted him to become. So it's not surprising that he has anger issues and that his walls start to crumble when he is reintroduced to the normal world. He interacts with it in the only way he knows how, which is as a child. At times it seems silly, but when you stop to think of someone who has essentially been held captive and brainwashed for a decade and a half, it's not really unthinkable.
Do I think it was a little heavy-handed at times? Yeah. But it was still interesting.
The corporate stuff... it is what it is. Yeah, Danny has been trained to fight the Hand, but he doesn't know how to fight someone like Harold, who is a master at controlling people and situations. He used Danny and the Hand against each other, not unlike Lex Luthor in Batman v Superman. I think they could have played him with a little bit more subtlety toward the end, but I do understand why they went with him. The Hand, I imaging, will be an issue to be dealt with in The Defenders, so they couldn't just resolve it here.
I had a hard time getting a feel for Joy in this series. She was a poorly defined character whose reactions and motives seemed to change from episode to episode. Did she love Danny like a brother? She seems to be a lifeline in the first episode or two, but then whatever bond they might have had is sidelined. I think that perhaps Claire didn't need to be as prominent as she was in this series, because she took over some of what Joy could have been doing.
Iron Fist wasn't the best series I've ever seen in my life. And at times, I felt like the OA was going to step out of the shadows and start doing her five movements as he did his tai chi, but that's just my wacky imagination.
I do think that the series was ridiculously over-slammed by critics. Especially after they praised Luke Cage, which was painful to get through.