yeah see both of your arguments here hinge on the idea that there are these magical people called "casuals" who have a very specific threshold of knowledge about whatever video games they choose play and Sakurai has somehow committed a crime by marketing games towards "them" to the detriment of "competitive gaming"
No I think it's totally fine that he markets his games towards a certain audience, but it kinda sucks when players form a community for competitive play and he makes no attempt to help them in anyway, even if helping them wont hurt his intended audience in anyway. And when I say casual I'm referring to the intended audience the game was marketed too.
in reality, stuff is - surprise - a lot more complicated than that, and Smash 4 doesn't really have any design choices that could definitively be argued to be anti-competitive (like, for instance, tripping was in Brawl) the only things that people see as problems with Smash 4 are things where it's dissimilar to Melee (i.e people complaining that shieldstun is low, even though the only reason they think shieldstun being high is a good thing is because that's how it works in Melee)
I never said Smash 4 wasn't competitive. I actually said Smash 4 was a good competitive game. Mechanics being different shouldn't make a game less competitive. Just because shields are different doesn't mean its worse, it just means you have to handle them with a different strategy. And that could be said for a lot of Smash 4 mechanics. It's not that their less competitive, it's that they just have to be handled differently.
(But then again you can use that argument to make literally everything seem competitive. There are many factors that decide how competitive something is. Mainly popularity.)
But there are design flaws that you can say are uncompetitive. The most important one is balance, and pretty much every smash game suffers from this. But he isn't doing anymore balance patches so that's not gonna change anytime soon
Also the reason people worship maylay so hard is because you have the highest degree of control over your character than in any other smash game. That's why in every Pm update they come out with a bunch of weird bug/engine fixes that you never knew existed, all of those were intentionally put in the game by Sakurai in order to give you the most control over your character as possible. Those mechanics were lost in the jump form melee to brawl, and that is one of the reasons why some of the hard core melee players can never make the switch to a different smash game. They aren't tourny tards, they just prefer melee, the same way people prefer pm and smash 4.