I actually think in a twisted way that’s his point. The campier the Batman movies became in the 90s, the shittier they got, until Batman vs Robin killed them dead. Thankfully Nolan was able to resurrect it again by restoring the integrity of the story and characters.
I enjoyed Ragnarok, but I worry that something similar could happen if they start going the route of “not taking themselves too seriously” and “just having fun like a comic book!”. Deadpool and Guardians of the Galaxy are a bit of an anomaly, and I don’t think that level of humor necessarily suits the other movies. Don’t get me wrong; I enjoyed the humor in the other Avenger movies, but Ragnarok definitely moves beyond comic relief to the point where I thought it was bordering on jokey and slapstick.
The best part of the movie for me anyway was simply the Thor / Odin / Loki story. I felt more could have been done with that along with Hela’s part to add a bit more emotion and drama to the film. Unfortunately it took a back seat (or rather, was being dragged behind the car on its leash) to the rest of the action and comedy.
It was still a good movie though.