As for Infinity War/Endgame and Thanos; it should be noted that the motive holes for Thanos were due to them changing his motivation from "simp for the living manifestation of Death" to "Edgy Malthusian". They didn't bother to have people ask why Thanos didn't wish for more natural resources for the population of the universe, because they wanted Thanos to be a scary warlord not a pencil pushing Malthusian who only speechifies; so they didn't bother have anyone try and argue alternative and methods and just go straight to the notion that Thanos's ideas were so beyond the pale that no one could justify defending them combined with Thanos being so stubborn that he refused to see beyond his "kill half the universe" scenario to even entertain alternatives, due to him seeing Titan's destruction/inability to stop their own destruction via alternatives as proof that mass murder is the only solution.
The whole Thanos thing was the main sore spot of the MCU, how could they link a cosmic villain who achieved omnipotence get in a fight with a guy who throws a shield around.
Awnser, they couldn't, and whatever made the Infinity Gauntlet comic storyline fun, it was lost in the movies, that at this point don't even pretend to have anything to do with the comics besides easter eggs for the retards like Robert.
Not to mention the whole population control was a laughable excuse for a villain motivation, more so a villain that has not only acesss to magic space tech, but god powers, and worse, the movies never tried to even show how the overpopulation is destroying the universe besides one planet that was destroyed long, long ago (how!?)
In the original story, the earth heros are nothing more than fodder, to buy time so Adam Warlock can figure a way to get to the gauntlet, and by half way of the story, all the heroes are pretty much gone, and the whole thing becomes a colossal clash between the cosmic entities of the Marvel universe (like Galactus and the living tribunal) and Thanos.
Props where they are due, the MCU pulled something unique in cinema, a decade long on going storyline, that ain't something easy to do, and even if the ending ain't that great (time travel will always muddy you story) and Thanos seems to not quite fit as the ultimate final enemy, in the end we were all on board to see the closure, and closure is what we got.
Said that, after end game, I haven't seen a single capeshit thing since (except 1 episode of wandavision), and I'm glad to be done. As much as i liked the movies, something was lost from the comics. I'm not that much of a dumbass to say that capeshit comics have much value besides cheap entretainment, but a lot of what made comics fun for me was getting lost in the adaptaions and now I just don't see the point, not when I could do anything else.