> I don't know what that first one means. You mean the glass design?

Not just glass. It started with Big Sur at least. It's forcing narrow and/or devoid of controls interfaces into every app, breaking decades-old system behaviours (misbehaving controls, wrong or non-functioning keyboard shortcuts, mobile-like interfaces in desktop apps etc.). It's eschewing MacOS-native development for shoddy half-assed ports of iPhone software even for first-party apps. Etc.

> I haven't seen a single ad in my system. Where do you see them?

I've seen notifications for Apple Music, and I've seen ads in the System Settings