There are some very very popular english speaking male vtubers. Some of them can even be occasionally entertaining. The problem with Zentreya is that he is actively uninteresting, any collab I watch with him has the same pattern of "Zen trolls someone in a uncreative, actively annoying/unconstructive way, they yell at him, he doesn't respond/takes ten years to respond and ruins all potential content from his bullshit". Like, the path to success as a male vtuber is there, Zen just doesn't want to put in the work.