It's terrible. Even worse is when they remove what you're looking for and re-arrange at the same time, so I can't find what I want no matter how well I search.
Or when European drugstore dm discontinues the product that's everyone's fave. 🙄 Oh, and they also rearrange the shelves from time to time.
My former grocery store rearranged several aisles in the last few years and I never fully recovered.
yet another reason i'm quite glad to live in sweden, our stores actually respect you as a customer: they rearrange like once per year at most, and are generally designed such that the exit is visible from the entrance and easily reachable, and you can just grab what you need and be out of the store in minutes.
Especially nowadays with self-checkout and some chains even letting you use your phone for checkout, it's an absolute breeze.