Way back on 10 April 2015, Netflix completely changed perceptions of what the Marvel Cinematic Universe could be.
Not only did Daredevil restore respectability to its title character after the disaster of the 2003 Ben Affleck movie, but it showcased a completely different side to the MCU: one with a much darker, more adult tone, where there was violence and gore galore, visceral action, and stakes that while lower also felt much more real.
The series launched its own entire corner of the MCU, with Jessica Jones following a few months later and taking its success in dealing with a complicated protagonist and complex themes even further. With a gradual build to team-up The Defenders, it looked like it was ready to replicate the success of the big screen universe.
Since then, though, problems have increasingly started to creep in. Daredevil Season 2 and Luke Cage both displayed cracks, which became caverns in Iron Fist and The Defenders. The Punisher, along with Seasons 2 of Jessica Jones and now Cage, haven't quite plumbed those depths, but they've not done too much to halt the decline either, with a number of familiar issues that just keep cropping up.