After shooting to fame on Netflix’s Stranger Things, Millie was branded annoying by numerous internet users who felt she was “over the top.” The online trolling got so bad that Millie once admitted she was scared to walk down the street. “It’s really hard to be hated on when you don’t know who you are yet,” she told Allure in 2022. “So it’s like, ‘What do they hate about me? ’Cause I don’t know who I am.’ It’s almost like, ‘OK, I’m going to try being this today.’ [And then they say], ‘Oh, no, I hate that.’ ‘OK. Forget that. I’m going to try being this today.’ ‘Oh, my God! I hate when you do that.’ Then you just start shutting down because you’re like, ‘Who am I meant to be? Who do they need me to be for them?’”