Genuine question - why all the hate towards the upcoming Brad Pitt film?

I understand (and enjoy) the occasional jabs whenever some behind-the-scenes stuff shows up after a GP, but I’m genuinely curious as to how the (at least what it seems like) vast majority of f1twt for example, has already come to the conclusion that this movie will be a disaster. I’m not high on hopium either but I haven’t seen anything glaring that decisively tells me that the movie will bomb. Maybe I’m missing something?