I agree on that.
Thor 2 was underwhelming.
But I mean, there's a demand of people who want to see where their characters go. People love the Hulk, for sure, and Planet Hulk is a very fun idea to be seen portrayed in a movie.
Movies have been getting a little too comedic, yes, but some people like it better that way. It's a matter of taste, maybe?
Fortunately, for the reviews I've seen, Ragnarok doesn't connect much with the overarching plot of the Marvel universe so you can skip over.
As for Black Panther, the Wakanda setting looks incredible. And I liked T'Challa in the Civil War movie. I want to know more about him and see his adventures. The production looks absolutely great. Also, looks like this movie will be more serious, like Winter Soldier maybe.