Windows 7 and Vista unified almost all of the control panel. Windows had pretty good design language then and the other Microsoft software used native frameworks that shared it. Moreover neither Vista nor 7 removed features or dumbified the settings when the switch happened.

Compare that with the half-arsed switch that started from 8 and still continues today with 11. Windows 11 actively removes features and implements the system programs with multiple clunky UI frameworks. While chasing the whatever techbro trend, Microsoft jumped into multiple design trends. Win 11 Settings, Excel, OneNote, Teams, core utilities like Disk Cleanup each of these use a different UI language. I do understand slowly upgrading certain components but newer and actively maintained apps using different UX, come on.

Each of their UI frameworks are suffering from lack of maintenance. For example, WinUI 3 still draws white symbol on white background for window controls and the bug exist in many Microsoft apps including Powertoys and their showcase apps. 11 actively forces users to use Powershell to do almost any medium level customization where 7 had nice UIs for advanced network configuration, extra Bluetooth functions (you could proxy calls on Win 7 over BT, now you have to have a MS account).

Either the author lacks taste or just judges things very shallowly.