You can't. Their official recommendation, in the Windows 11 Settings app, is to reinstall Windows 11. There's no way to migrate "backwards" on update channels, you can only go "more unstable".
Back in the late 90s when I first started experimenting with Linux, the parent's post definitely described my experience. I remember booting up into a text-mode login prompt and running 'startx' and having to do a lot of messing around with manual configuration files. One mistake with an init file could leave your machine un-bootable and you'd have to use a rescue shell to recover. Driver support was a mixed bag for sure.
In current year it's literally the exact opposite experience. I have more issues with installing Windows apps that will make driver changes or add stuff to the registry that causes weird unexpected issues than I have with Linux. Linux is quick and easy to install and tends to "just work" for me once it's up and running.
I'm sure choice of hardware still has something to do with mixed experiences. I did have one bad experience in recent memory with a work-issued laptop and the track-pad not working with Linux. I had to use a personal device while I was employed there since it was a known issue with that particular brand and the fix was an upcoming kernel update. But that seems to be the extreme rare exception for me. Most devices I've installed Linux on have worked perfectly right out of the install and have required me to do zero configuration to make it usable.
My home folder has files that have been with me since 2006 or so. This laptop is 7 years old and this is the third fresh OS install it has in its lifetime - With one exception, it's always been updated to the latest Ubuntu version as needed with the Ubuntu tooling.
What I have been doing to prevent data loss (that never happened) is to keep the interesting parts of my home folder on a separate filesystem and symlink them into my home folder. This allowed the previous fresh install to format the root partition and I didn't need to worry about my data being deleted.
On my main desktop the image has been rolling forward since 2008 when I switched to 64 bit. Naturally the hardware has been replaced around it several times since then.