If you are referring to his video from May 2023, "Why I deleted GrapheneOS", it is about the team lead, Daniel Micay, not about GrapheneOS itself. He, in fact, praises GrapheneOS to no end in the very same video.
Perhaps the fact that he brings petty interpersonal drama wherever he goes is the root of the complaint?
Perhaps the fact that he brings petty interpersonal drama wherever he goes is the root of the complaint?