See, here's the problem. I look at your lists of good movies and terrible movies, and my own such lists wouldn't look anything like those. So the answer to What Are You Missing? is just "Opinions LOL."
And I think this sort of personal preference drives the kind of articles we see bemoaning the Great Death of Whatever. Any given year is going to be great for some people and terrible for others. And so any given year, you're going to find such articles.
Which is why the article he linked went for actual metrics.
At some point, listwarz is the only way to actually talk about this argument beyond "lolopinons". And even if one doesn't believe it's the death of cinema or something, I think the evidence that article presents is rather compelling for saying there is a real trend going on.
Except I don't find the metrics all that meaningful. In the end, either Hollywood is putting a lot of movies that you like, or it isn't. Whether GotG exists because of some auteur realizing his grand vision, or because some cynical executive market tested the whole thing from start to finish, it exists and I loved it.
When there are so many good movies out there that it is functionally impossible top watch them all anyway, griping about the death of creativity in Hollywood feels like arguing between a countable infinity and an uncountable infinity.
"Yes, sure, there's an infinite supply of rational numbers, but think how lovely it would be if we had the irrational numbers, too!"
You need more good movies out there than any one person can watch, because most people have preferences. Some people prefer to watch mostly romantic comedies, and if there aren't any good rom coms out, that person is not going to be glad to hear that there are plenty of good war movies available. The more good movies there are in general, the bigger the spread--the more likely that no matter what your preference or opinion set, you're going to have as many or more good movies than you can reasonably watch.