LIKES (Spoiler warning):
- Stark and Nebula playing paper football. Along with his Mattel hand-held electronic football game, evidently Peter Quill liked just about every childhood recreational activity that I did.
- Showing the experience of defeat for the surviving heroes, living out the consequences of having lost to Thanos and failing to prevent the decimation. It would have been interesting to see the geopolitical fallout as well, but that was beyond the scope of what was already a three hour film.
- That Tony Stark didn't "kiss and make up" with Steve Rogers right away, and being justifiably bitter upon his return to Earth, reminding Cap of having warned them all that this calamity was coming and berating him for obstructing his efforts to avert it.
- Picking a theory of time travel - Hugh Everett's "many worlds" or multiverse theory - and sticking to it, using the Ancient One as the expositor to minimize the audience's confusion.
- Stark getting some clandestine and long overdue cloture with his father back in 1970.
- The epic, unparalleled, never-to-be-repeated final battle with all the surviving and resurrected heroes (courtesy of Professor Hulk's earlier, decimation-reversing snap) versus 2014 Thanos and his armies.
- The full-circle parallel of Stark, Thanos's mirror-image nemesis (much like Neo and Agent Smith in The Matrix trilogy), snapping him and his minions out of existence at the end, just as Thanos did to half the universe five years earlier. Also their final lines to each other: "I'm inevitable". "And I'm Iron Man".
- Steve Rogers getting cloture of his own by staying in the past after returning all the Infinity Stones (plus Mjolinir) to their original places and times and living out the life with Peggy Carter that he always wanted but had been denied. And, I suppose, anointing Sam Wilson/Falcon as his successor as Captain America.
DISLIKES:
- Captain Marvel rescuing Stark and Nebula instead of Stark McGivering himself out of the predicament on the Benatar the same way he built his Mark I armor in that cave in Afghanistan a decade earlier.
- I was indifferent to who got sacrificed to obtain the Soul Stone on Vormir between Black Widow and Hawkeye. It would have been far more riveting for Stark and Rogers to have gone there instead - picture Cap's reaction to seeing Red Skull again - and adding the additional stakes of Stark having to choose between his daughter, Morgan, and bringing back half the universe. Leading us to....
- Choosing the multiverse theory of time travel. That guaranteed that there would be no stakes to the Avengers' "time heists" by eliminating any chance of changing their own history far beyond just averting the decimation. The writers did somewhat get around it by having Rogers return all the Stones, but what about the "butterfly effect" of his living out the rest of his life in the past, even under an assumed name, and preemptively wiping from existence the children that Peggy Carter had with the other man she originally married? That seems awfully selfish and reckless for a man of Cap's long-established moral probity.
- The fact that Thor never shed his Homer Simpson gimmick. It made sense early in the plot, his guilt over having not "gone for the head" when he had the chance to stop Thanos from The Snap toxically compounding his grief over losing his entire family, his homeworld, and half his people to the point where he just gave up and didn't care anymore about anything. But his conversation with Frigga back in 2013 Asgard should have provided him the cloture and absolution he needed to make peace with his past and resume his kingship of Asgard in the present, not confirm his functional abdication under the outrageously false dictum that "you should be who you are, not who you're supposed to be". It was a character regression.all the way back to the end of "The Dark World," lubricated by Rocket's free beer.