I've had Windows 10 since the free upgrade. Literally nothing bad has happened aside from some updates resetting my customized settings, which I quickly fixed in like five minutes.

They aren't spying on you, or collecting data, and sh*t. I have had some games that were "borrowed" from friends, if you know what I mean.

TikTok on your phone is collecting a thousand times more data on you than Windows 10 ever cares about.