Again, some people are happy with this and some people know to take it as it is. This is a video game, where you're not entitled to anything in the first place and the costumes are mostly optional bonuses for those interested. Your annoyance with the costume is worth infinitely less than someone pleased with it. If we base our picks off of who gets annoyed with certain options, you'd never get anything. It's a compromise to give fans the chance to enjoy something, and some take that opportunity and others don't. It's fine to not be happy with how things turned out, but crusading against it and consistently discounting people who may actually like the "something" just makes you come off as a *******.
And I guarantee that everybody upset at the "something" would just complain as much about the "nothing," so we really don't get anywhere with that.
There's a few things wrong here.
First of all, you do know that when people are stating an opinion they don't need to classify that it's just their opinion that they're not talking for everyone, right? If I say something I don't need to state that it's just my view of things and that I'm not taking everyone else view into consideration because I'm stating my opinion.
Yes, it's a video game, but that doesn't mean we can't opinions that might constitute as being negative. We don't have to like everything that is in the game and we're allowed to not like stuff and aspect of the game. Complaining about Mii Costumes like Rex helps send a message that people like these types of Mii Costume so we can get better ones because these look absolutely terrible and doesn't fulfill the purpose that Sakurai think they do, make you "feel like" your playing as them. They look like ugly bootlegs, but I will go to the tallest mountain and sing praises for the Sans Mii Costume because it looks so freaking good. We need more costumes like Sans, who actually looks like the character, and less of these bootleg characters.
"Some people are happy with this" is quite literally one of the worse defense because it tries to silence & dismiss others opinion because it doesn't fit with what people want to hear. With "some people are happy with this" means that nothing in this world that is created is allowed to be disliked & criticized. "Don't like Batman vs Superman, well someone else like it so shut up because those people's comments mean so much more." This doesn't work, it's meaningless and just a quick way to make people suppress their opinions.
Now let's talk about this "entitlement" bullcrap. The whole "you're not entitled to anything" is also bullcrap because it doesn't negate the criticism that comes it's way. "You're not entitled to a good game, you're not entitled to a good movie, you're not entitled to anything so you should never complain about anything." Are we "entitled" to have a game with normal progression system? Of course not, but that doesn't mean people sit down and just accept what is given to them, because other wise you'll end up with more games like EA Battlefront 2. Are we "entitled" to have a Smash Bros game that doesn't feature tripping? No, Sakurai could totally patch that in since it's his game that he's developing, but if he does that then let's just say he's not "entitled" to our praises.
And lastly this whole "you should be happy with something," is actually pretty bad. The thing we got we're not happy with, but you're coming in and saying "you should be happy with that." NO WE DON'T. We don't like the thing we got, but we're being told that we should just be happy with it because it's "something." It only works like that for you because you don't honestly care about it. It's easy to say that when you got no investment in. But think of it like this, say some executive took a fiction series you love then made it into a movie and turns out to be super freaking bad in many ways, but someone comes up to you and say "you should be happy that they made that movie." Nobody needs to be happy with it and people are allowed to say that that rather not have that be a thing at all.