LRC keeps adding a subfolder when importing

There are two main aspects to this: the destination folder you choose; options for how images are to be organised directly within this destination. You can also opt have a new subfolder made, and used as the destination.

The options are: into one folder (just put all the images together, directly inside the chosen destination folder); reflecting the subfolders found in the source e.g. if a camera card has got various image folders present; and what's happening here: as dated subfolders.

Often import settings are set to automatically make YYYY subfolders as needed, and inside each one further MM and DD folders, to reflect the capture dates of all the photos.

In that case, you should not select e.g. "2024" as your destination. You should select the folder level above that. Now you can keep for many years using this exact same destination as a constant, and the import will all by itself take care of year, month, day... thus it will make a new 2025 automatically when needed, in due course.