“Avengers: Infinity War” Spoiler alert: The power-mad crazeballs behind the Marvel Cinematic Universe are out of control. First they blew up an entire planet (at the end of “Thor: Ragnarok”) and laughed if off, and then came Thanos’ snap, which (I said “spoiler alert” already — get off my case!) killed off half of all life in the galaxy. When that happened, I wanted to scream, “You can’t do that!” and not because I care about these characters (most of whom are quasi-invincible imbeciles anyway — although I was just starting to like Black Panther when he bit it), but because now we have to wait a year to find out whatever cheap device they use to undo the Decimation. In the 1978 movie, Superman flew around the earth so fast that he reversed time and revived Lois Lane. Then in “Justice League,” the Man of Steel himself, impaled by Doomsday, turned out only to be “mostly dead.” I know that those are DC characters, but hear this Marvel: Twenty films over 10 years is too many. You can scrub ’em all, as far as this fed-up critic is concerned.