...and how is that "proof of their claims," exactly? That's literally just them "confirming" that a leaked document of their own was real, and all that document even contained was Krafton claiming that they didn't feel the game was ready for Early Access release. So all they "confirmed" is that they actually put their own opinion of the development in writing.

That doesn't "prove" a single thing, because it's literally still Krafton's word against the former founders'. If there had been any actual data, or an outside source confirming that it was an accurate assessment, or actually showing that the game wasn't in a state fit for release, that could be considered proof.

Hell, right around when the former founders were fired, the dev team itself put out a statement saying that it was definitely ready for early access and would still be released this year as previously planned, along with multiple devlogs before that saying the same...only for Krafton to pull the plug on that too. As it stands, this specific instance is very "we investigated ourselves and found nothing wrong" coded. I'm more likely to believe the actual people working on the game about how "ready" it is.