See, here's the thing I always see when people have to actually assess Kojima's work.
"Well, I guess it was pretty bad but honestly he had some interesting ideas!"
Sure, okay, but everyone has interesting ideas and implementation is how you make those ideas actually work. The video game industry in general is full of interesting ideas, but much like a poorly directed film, the idea doesn't just need legs, it needs, well, direction. And Kojima is a terrible director. Everything he does seems to point out that his own logic and understanding of his own characters and world is flimsy at best (not quite as dumb as Kingdom Hearts, but close). He might be a fine guy to work with in a writer's room scenario, where his ideas can be tempered and molded into something that might resemble a story and the characters therein. But him in a directorial position is just going to result in a mess of poorly thought out ideas, all shouting at you at some point, "LOOK AT THIS IDEA", while everyone just shakes their head and tries to move on with their lives, hopefully maybe eventually finding some coherency in the inanity.
He's sort of the exemplar of the "auteur" today, which, whenever I hear it in just about any context relating to games, is something I interpret as, "incompetent person given too much agency / power while making a video game". So many of the creators leading the game industry get bandied about like this. And while it can result in some genuinely hilariously stuff, such as whatever brain parasite Peter Molyneux thinks up next, it also means that good ideas are being buried under the incompetence of their directors, and more problematically, they're being praised for their incompetence. Both by the industry and the fans. It'd be one thing if one was tempering the other, but for whatever reason (*cough* gamergate *cough*) that sort of considered rhetoric seems to be strangely absent from video game discourse - rather the, "players are asshats" mentality seems to be much more common, where developers seem to be taught to scorn their fans, rather than learning to filter. I am not condoning toxicity here, people who tell others to die or stalk people on Twitter are creeps and best avoided or if possible, silenced, but that doesn't mean all voices from the outside should be ignored, especially those with reasoned, legitimate concerns. This problem of avoiding feedback goes all the way up to the top, and most games seem to be the worse for it. Not taking in any criticism is what's led to so many issues in the video game industry, and incompetent directors being heaped with praise for their mediocrity is just one of the more recent. "Auteur" directors indeed.