Game problem. (Batman: Arkham Knight)

Check the integrity of data on Steam (if licensed). If RePack, then reinstall it, if the problem persists - download another. Also, the problem may be in the video driver.

there seems to be a problem with the video card, but if only in this game, then maybe a pirate or firewood

Such interference can occur as an option due to dust on the video card, improper overclocking and overheating. It will not be superfluous to get it to clean.