>>> Windows 11's file browser lags when opening directories with more than 100-ish files. Windows 11's file browser takes a few seconds to open at all.

>>> Context menus take a noticeable amount of time to appear.

> I can almost guarantee this is from some endpoint management software your company installed.

This can also be due to OneDrive / Sharepoint / Teams etc. Which I suspect supports your point.

A hard lesson I learned was that cloning a git repository into a directory managed by OneDrive is a recipe for interesting behavior.