It wasn't necessarily Doki herself so much as the rampant and completely disingenuous hate campaign against Nijisanji English, totally steeped in lies, hinging upon a strawman, all serving not to be righteous but to signal boost a girl who went on to make the same mistakes after supposedly leaving her corrupt and totally evil handlers. NijiEN was meh overall, and can be considered effectively dead, but the ridiculous amount of hate they have received for like three years now has irreparably harmed English vtubing in general. Mind you, people used to vouch for NijiEN, because they liked the more laissez-faire vibes and energetic collabs. Then instantly, all that goodwill was evaporated, and the few shots that other small corpos received in the crossfire (including Phase but also pretty much everyone else) drew a line in the sand. You're either a corpocuck or a ligger, there's no healthy middle ground. Doki being the linchpin is a certainty but to act like it all revolves around her situation is to ignore what haters had been doing. They wanted this sphere of vtubing to die. They wanted everything to be drama and fleshtuber interactions. They are the real enemy.