I'm logged in to my Microsoft account, so I've not seen any of that.

The only thing that I recall popping up is those setup screens that appear after some updates for no good reason.

I also don't recall any particularly buggy experience with Windows 11.

Meanwhile my Mac mini M2 Pro is having issues all the time. From the start I could not even use my second monitor without turning off and back on the primary monitor first for the second to come on.