To be fair, a lot of shows, episodic shows have trouble finding themselves early on. It's not uncommon for TV shows to have a rough footing early on in their runs. Sometimes it will take a long-running series 2-3 seasons to really hit its stride. I recall Person of Interest in its first couple episodes was a little rough and ill defined, but once it picked up, it was great.
But I think though it comes from a place of Scott Buck not being able to meld these disparate elements together in one TV series.
Also, let's face it. The Marvel Netflix group of shows famously went over so well for their dark, edgy gritty realism. The whole street level urban vigilante thing.
Iron Fist has elements that are far away from that. A hidden city, and also a magic dragon. I think the show is having trouble putting those things in but also trying to keep, real people, real situations in New York City thing.