In “Bullet Train,” Brad Pitt plays a lovable-loser assassin (code name: Ladybug) bent on self-improvement. He’s an easygoing sweetie, in the spirit of John Cusack’s gun-for-hire in “Grosse Pointe ...

Let us now praise Brad Pitt. Or rather, the whole repertory company of Brad Pitts — the leading man who chased kooky character-actor roles, the matinee idol who stopped worrying and learned to love ...