Obviously a lot has happened behind the scenes and two bad games are not the main factor in his dismissal. Let's wait and see, I'm sure information will leak out over time. As for his future job, with such an image he has no right to make a mistake. He needs to take some 100% option, at least for the sake of "a point in the resume" that he worked and was not firedi' with a scandal 
I first doubted the news when i saw it in a group chat, i felt it was framed just to ridicule Manchester United fans. This is a sudden dismal, in a way we have to belief that the cause isn't just about the bad games at the very start, Erik ten Hag isn't the only manager having a bad start, why use three games of coaching to judge. Where they not aware of his coaching style before deciding to bring him to the club as replacement for Xabi, Erik ten Hag might not be the wondrous manager in search but every manager deserves some moments of trial, at least till January, if his performance with the team continues getting worse.