I fully believe it was Konamis fault.

Its known they were doing that team separation bullshit to devs (not just to higher ups but on every single level) before and after MGSV. that would immediately blow up the budget of game development as it requires immense coordination.

Imagine a map designer needs a watchtower in thier level, but they cant contact the model team or even the specific modeller who was making the watchtower without going through leaps and bounds with management activity sabotaging them.

Now Imagine that in every single step of the games creation.

We also know that Konami wanted out of the game industry, which gave them good reason to cancel any big games they had in development; such as Kojimas silent hill game which would have beenin development long after any problems Kojima would have started to course for the company. They'd have never given him the project if he was causing all the problems they alleged he did.

I don't think Kojima was this paragon of a designer or anything, he definitely didn't help with his overambitious mindset and splitting the game into 2, but from what little has been definitivly revealed and what can be inferred, I don't see how Kojima was in the wrong in the way that Konami claims.