I think you're being a bit unfair to MCU blockbusters here. While it is true that, at their worst, they descend into exchanges of brightly-colored power-beams, for the most part they avoid this trap. Many Marvel climaxes serve effectively as the emotional climax of the protagonists' arcs - think of Guardians of the Galaxy 2, Civil War, or The Winter Soldier. Even when they don't work at that level, they tend to be well constructed as a series of individual, distinct beats or gags, arranged not unlike the panels of a comic book - think of Spider-Man: No Way Home, Thor: Ragnarok, or Avengers.
Its precisely on these terms that Cosmic Rewind seems to stumble. Despite laboriously establishing Quill's emotional connection to EPCOT the attraction does nothing with that backstory, and the ride is without emotional stakes for any of the heroes - or the guests. Even more inexplicably, the entire ride portion is one constant journey through undifferentiated space with little visual variety. This is particularly odd since the pre-show sets up such an elaborate backstory and the "jumpgate" formula is the perfect conceit to establish a set of visual beats or quick comedic gags, which is how Gunn uses it in the films.