I mean, book authors routinely manage to do pretty good writing, why can’t we have that for film as well?

You really can’t compare the two mediums. What works in books most likely doesn’t work in movies. Like trying to do a setup like in a book would bore the shit out of everyone if it was done the same way in a movie. You and I might be interested in that long setup, but the GA definitely doesn’t give a shit.

There’s a reason why Disney Marvel movies insist on making a joke every 5 minutes in their movies.