Imagine that Melee is pizza. People love it, it's got all of this flavor and depth.
Then Brawl comes out and it's chicken soup.
Obviously, a lot of people would prefer pizza over chicken soup, but then you hear some of the complaints: "What the hell is this? This tastes all wrong!" people declare. "I'm trying to pick up a slice but my hands just get all wet, and I try to eat it with a fork but I barely get anything!"
But there are people who are eager to "prove" that chicken soup is fine, and all it takes is finding and adding the right key ingredients. "Hey, it might be chicken soup now, but if we add some mozzarella and some tomato sauce, you'll see that it's great!" No matter what they do, though, it just doesn't taste like pizza, it doesn't feel like pizza, and people are disappointed in it even more.
In the end, it's not wrong to like pizza more than chicken soup, and it might even be possible argue that pizza is a superior food in general. Hell, maybe Brawl wasn't even a particularly good chicken soup and was just soup in a can. However, because people were unable to see or accept the fact that chicken soup isn't pizza, they also failed to approach it on its own terms. Instead of trying to add the right seasoning that would match the flavor profile of chicken soup or using a spoon, all they had were hands dripping with broth, and a look of dissatisfaction.