6. Axl's floating head
This scene was mocked so much due to the poor CGI, that Marvel actually re-did it when Thor: Love and Thunder was released on Disney+. Think of it as a patch for a video game whenever developers make a mistake, and even after that patch the scene still looks... a little bit weird if we're being honest.
So far on this ranking, we've talked about suits/scenes that should look good on paper thanks to their amazing design, but end up falling short due to the VFX quality. However, this case is a little bit different. A floating head appearing out of nowhere looking like a golden hologram would always look weird no matter how good the special effects were. But to add insult to injury, it feels like the CGI was also rushed on this particular scene (especially on the theatrical release) and the result is less than stellar. No wonder Marvel tried to fix it at a later point.
5. Black Panther vs Killmonger
Black Panther is one of the best and most polished MCU projects ever to be released, even going as far as earning a nomination for the Best Picture category at the Oscars. However, there's one sequence in particular that isn't up to the same level of quality as the rest of the movie, and that's the final fight between Black Panther and Killmonger.
The whole thing feels like a video game cut scene, as both characters feel very "floaty" in the way they punch each other and jump great heights without seemingly a lot of effort. So what exactly went wrong? Well, VFX artist Todd Sheridan Perry has since talked about how this whole sequence was undercooked due to time constraints and how they had to focus on other big action scenes instead.
Granted, this one fight doesn't reflect how good the rest of the movie looks. But whenever we watch it, we can't help but feel like delaying the release date of Black Panther a little to ensure its VFX was always up to standard wouldn't have been all that bad.