The Marvel Cinematic Universe (MCU) might be the most popular media franchise in the world, but that doesn't mean it's without flaws. There have been plenty of healthy discussions about what Marvel movies get wrong. Some worry about the tone of the MCU, asking questions like, "Do the Marvel movies have too much comedy?" Others point out specific characters, plot elements, or entire films as trouble spots. In other words, although the MCU is the most loved thing in the universe right now, that doesn't mean it's universally loved.
(Comments have been edited lightly for clarity.)
From Redditor /u/JonSnow31391:
Hulk has gotten the short end of the stick lately. Hulk is supposed to be the strongest Avenger physically. His durability and strength should just edge out Thor. Thor might be more powerful, but recently the movies have shown Thor as stronger as well. Part of it was because Hulk got beaten in Thor: Ragnarok. Of course you can't have Thor lose in his own movie, but they showed Hulk being winded much earlier than Thor. I think they needed to show Thor using his lightning on Hulk a little while longer instead of just one blast.
Additionally, Hulk losing to Thanos should happen. But when the same movie shows the guy who beat Hulk also surviving the force of a full star, and then defeating Infinity Gauntlet-powered Thanos with one blow while charging into a beam from the Gauntlet, it puts Thor waaaaay above Hulk in showings.
From Redditor /u/TheRedSpeedster:
As long as characters and stories are well-written, I couldn't care less about "staying true" to the comics.
From Redditor /u/occupy_westeros:
Age of Ultron is pure, campy greatness. The action scenes are great, everyone is wringing every bit they can from the script, and James Spader as Ultron is amazing. I think it's aged really well, and people are too hard on it because they didn't know where the MCU was going. It's kind of the Attack of the Clones of Marvel movies, and I mean that in the best way possible.
From a deleted Reddit account:
I'd say there's a bit of peer pressure sometimes. Like you HAVE TO love Homecoming and think it's the best Spider-Man movie ever made. You HAVE TO dislike Defenders and Inhumans and not acknowledge some redeeming qualities. You HAVE TO dislike Whedon because the Russos are in charge now; we can't acknowledge all that he's done for the universe. You HAVE TO dislike Guardians of the Galaxy and Ragnarok because they're not serious, unlike The Winter Solider. People can disagree on things.