I liked Quantumania best of the trilogy but I prefer action movies over comedy movies. I can see why someone who liked the first and second movie might not like this one. I don't understand the people who said the movie take forever to get interesting, there already action scenes early while still explaining the lore of the Quantum world.
There is still humor in the movie, I will say it reminded me of Thor: Ragnarok. Not too much and terrible ones like Love & Thunder and still know when to keep a scene serious.