I am using Windows 10 but whether I am using Windows 10 or 11 does not affect the calibration and profiling I do using a Spyder.
As I said in an earlier post, if I was standing next to you when you opened my image using your monitor it is very possible I could agree with you about the colours being off even though they look correct on my monitor.
The difference is mainly due to the different settings/setups in our respective monitors.
You choose to not profile your monitor and calibrate it only by eye. That is fine. Many people choose that as well but it increases the chances of someone else's image looking different on your monitor compared to how it looks on their monitor and vice-versa.