Because windows is annoying as hell to use and you get literally nothing from the spyware, ads, and intentional dark-patterns.

Windows is constantly malicious, even if you do your best to make it not so, it's designed to be as malicious as possible while still being tolerable.

Linux has never done something bad to me that was outright malicious. that alone makes a huge difference for me.

linux is slowly getting better, windows is rapidly getting worse.