I think viewers are sophisticated enough to be able to tell someone who will pretend to hate their audience for the bit, and someone who genuinely hates the audience they've amassed. I, and everyone else that watches Lia, know Lia genuinely appreciates her audience, there's been plenty of times where she breaks character from her bratty tsundere personality to show said appreciation. Lia's also nearly at four years of being a vtuber now, regularly creating content live - if she genuinely hated her audience, we'd know by now.