It's completely inconsistent with traditional Windows design language and there's no "Cancel" button or an X in the corner to click on so you can't cancel out of it with your mouse and have to reach for Esc on your keyboard
It also tries to funnel you into a shitty Microsoft service
It forced me to sign up so my brother could play minecraft bedrock. I had had it disabled but had to reenable it because windows threw a tantrum that I was using a non-microsoft windows account.