Given the fact that Emile is a full blown autist, I wonder if people just genuinely found him annoying but couldn't vent their frustrations publicly without getting speared by the mob for mocking a wholesome youtuber with a mental disorder. It was only until some troon decided to kick the autist and everyone else follow suit because they were done with his annoying autistic schtick and not (just) because of his feet advances or whatever.
This isn't the first time he's lost friends beforehand as seen in the video below, so it makes you wonder who else genuinely finds him annoying to be around? Jon very visibly gets annoyed with Emile throughout their years together, was it a similar buildup of distain he had for him that Jon couldn't wait until the right time like this to drop him?