The ironic thing is that Mel Brooks did a movie with the title, "Life Sucks". It was a comedy but there were some serious scenes. One of them was a scene where a homeless man dies on the street. Brooks said he tried a dozen different ways to film the scene as a comedy and then he realized that you cannot do that as comedy but it just plain is not funny. So, for the first time, he realized he was going to have to do a movie where some of it was done as pure drama because some things just aren't funny and trying to do them as comedy will only make the audience feel bile in their throats.
Now, obviously, there's a difference between a homeless man dying on the street which touches on reality and the deaths of a race of gods which is total fiction. But, for me, Thor Ragnarok was just wasted potential. It succeeded at being what it was trying to be which was the very epitome of what the MCU has become which is basically have fun for two hours if you can keep from sighing at the need to turn everything into a joke to keep the audience coming back.
Mind you, I do understand the counter argument which I've heard many times in real life that people work hard all day, have to concentrate on their jobs and so on and they want fun entertainment, not to be lectured to or "taught a life lesson", etc. They want to forget their problems and laugh, not be reminded of all that's bad in the world.
And I do get that. I just think the MCU is pushing it too far and, worse, doing it because they have little confidence in selling the product any other way. I remember Bill Bixby once said that the 1960s Batman was the epitome of the campy comedy style but he suggested we ask ourselves why they did it that way instead of as a serious drama. His conclusion was that the people making the show thought the only way an adult audience would accept it was as campy comedy and they essentially made fun of the idea.