Compared to the debuts of Daredevil, Jessica Jones, and Luke Cage, Iron Fist was easily the least well-received Netflix premiere season to date, and it's understandable as to why. The mere premise of Iron Fist and his world is one filled with crazy martial arts, mysticism, and even a dragon, which allowed for his show to be the biggest, wildest one of the bunch, but that's not what fans got.
None of the fight sequences in the series as a whole stood out in comparison to, say, the hallway or stairwell scenes of Daredevil's first two seasons, more time was spent in corporate boardrooms than faraway lands, the more we learned about The Hand, the less dangerous they felt, and the hyped up conflict with Shou-Lao the dragon didn't even play out on screen, as though fans would fail to believe a real dragon exists in the same world where a talking raccoon shoots guns and a teenage girl is best buds with a Deinonychus. To put it mildly, Iron Fist didn't live up to the hype for many people because it didn't go all out.
That said, it also wasn't a complete misfire. It got better as it went along, it introduced great characters like Colleen Wing and Ward Meachum into the mix, gave Madame Gao a real chance to shine beyond Daredevil, and at least established Iron Fist enough to where (hopefully) his character and world can evolve and grow into something even better in the future.