I'm in the same boat. Even Baby Groot couldn't save it from being in my bottom third of MCU movies. And I think Guardians of the Galaxy is an absolute gem. It's the movie that took the MCU from "really solid" to "something uniquely special" IMO. They proved no name characters, with a relatively no-name cast, can turn in a heart wrenching, tear inducing, hilarious movie with a ton of feeling. I was very disappointed with the second one's inability to capture that.