In Infinity War, why didn't they...

...start the movie with half the population gone and then show us how they got there.
...include Coulson. Like at all.
...provide barf bags in the theater.
...have The Collector (played by Benicio Del Toro) LOOK like Benicio Del Toro playing The Collector.
...give Natasha more to do.
...make it easier for people to get up and walk out in the middle of.
...explain that Hulk refused to come out because he was afraid.
...include the Inhumans (for a chance at redemption).
...bring back Grandmaster.
...offer pain-killers for all the gut punches.
...have more than two/three people protecting Shuri.
...inspire hope.
...just cut Thanos' arm off.
...have Hugo Weaving at least provide the voice of Red Skull.
...leave Tony someone to talk to (besides Friday).
...have Fury attempt to contact, you know, SHIELD!
...introduce Carol Danvers here.
...show an infant in the back seat of the vehicle Fury drives into.
...include ANYONE from the Defenders - especially since there was a giant circle hovering over NEW YORK CITY!!!
...have a better script?