I have been using Windows 11 as a daily driver and don't really understand people's hostility towards it. It is definitely an upgrade over Windows 10. Comparing it to Vista is nonsensical. I don't agree with a few decisions (like making centering the menu a default?) but most are easily fixed. I would like to see them delay it to fix some problems, but it's possible those will already be fleshed out by launch.
People just don't like change. There will be lots of weeping and wailing an gnashing of teeth, then people will grow accustomed to it. Same happened with 8 and 10. The furor over 8's missing start menu was intense, even though it takes literally seconds to install Classic Shell and get a better start menu than Windows 7 ever had. In 3-4 years the cycle will repeat again with Windows 12.
People don't like clearly unfinished products rushed to market before they're ready.