Ti West’s X trilogy isn’t a series of films so much as it is a stack of them. The three features feel like they’re best considered when layered on top of one another, like transparent cels that only add up to a whole image in combination, and that play as incomplete fragments when looked at alone. His franchise may jump back and forth through time, from the 1970s of X to the 1910s of Pearl and on to the 1980s in its latest installment, MaXXXine. But thematically it stays put...