Agents of Shield was one of the best and most underrated superhero shows ever created. The first season wasn't any good so some people stopped watching which was a big mistake. I barely made it through the first season myself but if you can power through it you won't regret it. Like many people here have already said, each season gets better than the one before it. It starts off as a spin-off from The Avengers as it follows S. H. I. E. L. D. one year after that first movie and is originally part of the MCU. Then they made the incredible choice to break away and make the show their own, and that's when it gets good.! It follows a S. H. I. E. L. D. team led by Phil Coulson and the rest of his team (Daisy "Skye" Johnson, Melinda May, Mack, Leopold Fitz, Jemma Simmons, Grant Ward, Yo-Yo, Deke and more characters that come and go throughout the seasons). It has some of the best writing for a superhero show and some of the best characters. If you haven't seen this yet or stopped watching after that terrible first season then do yourself a favor and go watch this as soon as possible.