That's when an operating system is supposed to do. They make mistakes when they make it worse. Usually, the operating system starts worse and eventually gets tolerable. That happened with Windows 10. Initial versions were far inferior to Windows 7, but now it's at a pretty good state. Windows 11 is a pile of fucking garbage. There is no compelling feature in Windows 11 that would make anyone want to upgrade. There are compelling reasons not to upgrade, such as advertising, menus that require more clicks to get the same shit done, forced use of Microsoft account, etc.

There's also the fact that Windows 11 refuses to run unless you have a handful of specific hardware in your computer, such as TPM 2.0, and a relatively modern processor. There is no technical reason for this requirement, it was discovered very early on that if you override the check it will install and run just fine. But Microsoft seems determined to get people to throw away their older but still perfectly good computers.

That is a very big part of why Windows 10 is still so popular. If you have a computer from six or seven years ago that you've upgraded once or twice, it's probably still perfectly good. No reason to throw it away for Windows 11 when you can keep on trucking with Windows 10.