Let's face it Windows will never be perfect out the box without tweaking/customising to individual preferences. The utility/customisation scene exists for this very reason and often does a far better job than MS.
Windows 11 as an OS, speed stability, scope is perfect and better than 10. Everything else is cosmetic and can be changed, if the user wants to change it.
That's what I've done and it's a far better experience visually and usability than Windows 10. I upgrade to every major Windows version pretty much from day one of RTM and the OS at its core has always been better, more stable and faster each gen.
So a blanket comment like "It's terrible" is pretty inaccurate really.
This isn't iOS/MacOS where whatever you are given you have to tolerate. If you don't like bits of Windows, change it, it's easy and often free.