Referencing this: https://www.reddit.com/r/ValorantCompetitive/comments/ushpoy/vanity_on_xeta_and_curry/
That's honestly a valid reason from Vanity. I have no doubts that Xeta's english is perfectly good (far far better than my Korean at least), but when you're stressed or under pressure, people tend to revert to their native tounge, so I imagine he suffered from that a bit. Same way that when someone's under pressure it becomes harder to think, communicate, and make sensible actions even if they're trying to speak in their main language. Also if your argument is that he shouldn't feel pressure, you've obviously not competed in high level competitions. None of this is Xeta's fault of course. I wish everyone involved the best, and I want more good NA teams, so let's see what happens!