Loser’s Isekai

Yuki Tanaka is a shut-in that gets summoned to another world with the worst skill ever: "Delayed Imitation," which copies weaker versions of other people's powers. The kingdom decides she's useless, kicks her out with no preparation, and wishes her luck (aka, certain death.)

Teaming up with a mercenary who pities her, Yuki tries to avoid the Demon Queen, survive attacks from over-the-top enemies, It's less "epic hero journey" and more "how not to die in a another world."