It bothers me simply because they said they wouldn't, and I don't understand the point of it for a UI refresh. Also bothers me because I don't want a UI refresh.

Because of new hardware requirements and built in Teams. If you don't want that you are now an a system with designated end of support.

because I don't want all my stuff to break and I don't want to configure everything again, which is something that happened with all numbered Windows updates to date