Attitudes like this are precisely why Nintendo doesn't listen to the competitive Smash community. No matter how close it is to Melee, no matter how much they try to compromise to please both casual and competitive audiences, they will never, ever be happy unless it's Melee with updated graphics. The sped up gameplay and For Glory mode are Nintendo's way of trying to make SSB4 more competitive while keeping the casual audience happy. Given the fact that Smash's casual audience vastly outnumbers its competitive audience, the fact that Nintendo (a major corporation with vast amounts of money on the line no less) is essentially sacrificing profits on a system that is already crashing and burning to appease a small but dedicated portion of its audience speaks volumes about their character.
Things like Wavedashing were never intended to be utilized in the way that they were, Sakurai himself has even said this. It was an exploit. In other competitive games, things like this are quickly patched without ceremony. As someone who plays other games competitively (Dota 2 is my competitive game of choice, and even its toxic community doesn't complain as much), I can safely say that removing exploits is a very common practice. Nobody ever complains
Demanding that every minute detail be made more competitive just to appease a minority of the community as a whole isn't just unrealistic, it's selfish. Nintendo doesn't have a responsibility to cater to you every whim, their job is to make a game that will be enjoyed by its intended audience. Even though Brawl had its shortcomings in my opinion (balance was atrocious), it was enjoyed by the bulk of its players, with a vocal minority in the competitive community decrying it. If Smash 4 was very similar, I would understand.
Sakurai is doing his best to make a game that is enjoyable for all. His job isn't to make a game that caters specifically to a small portion of the community. I love you guys when you're actually content, but I swear to god I want to choke you guys sometimes. This must be what it's like to have kids.