Saw it last night. I'd give it a 7-7.5/10.
Ego, and all that stuff was the best part of the movie. The movie had a lot of heart; that heart is what saved the whole film from being cringeworthy, in my eyes.
Groot dancing at the beginning, in my opinion, felt so forced.. it felt like "look, we have baby groot..he's so cute!!" Didn't like that, it opened up 100% like a comedy.
Also, way too many jokes, the majority of which fell flat. Fortunately for my taste, the relationships were strong and the movie had heart. Definitely not Marvel's best.
Also, no Fox on the Run in the movie kinda sucked. The Sweet were the epitome of 70s glam rock. Shoulda opened with that.