Hey, do you think Windows 11 sucks goat sweat through a bendy straw?
You can go back to Windows 10 with a little planning and two USB keys.
Step 1: Get your swearing, searing hatred of Win11 on (optional, but feels nice)
Step 2: Download the Win10 Media creation tool somewhere eazy to get to (your desktop, download folder, whatever). It can be gotten here, freezey peezey: https://www.microsoft.com/en-us/software-download/windows10
Step 3: Run that sucker, and choose "USB drive" where prompted, and choose the smaller-capacity USB key (8gb or more). NOTE: That drive will be reformatted. Back up anything you have on there if it's not already.
Step 4: Use your large-capacity USB drive (or other external storage media, or whatever cloud-based solution you like - I have two USB thumb drives and three separate offsite/cloud storage options, all of which are free) to back up all your important shit.
I AM NOT FUCKING AROUND. THIS PROCESS WILL WIPE YOUR C:/ DRIVE LIKE A DISH PIG CLOSING A DINER. YOU WILL LOSE ANYTHING NOT STORED ELSEWHERE.
Step 5: Unplug your backup drive(s), slap that naughty little USB key with the install media, open windows explorer
... and locate the setup.exe file.
Step 6: Cackling like the mad genius you are (wenis dance optional, but I don't know it, and would trip over one of my cats), run that bastard and choose the only option available (the other two will be greyed out and unselectable):
Step 7: Get yourself a celebratory snack and/or beverage, as your computer rejects the farce of AI, constant marketing, and pushy bullshit.
Step 8: Be subjected to Win10's first-use bullshit. Hey, it can't all be kittens and middle fingers.
Step 9: Reinstall all your shit, and copy the stuff you backed up back. And, hey! You now have both a recovery USB key and all of your shit backed up so if you or your computer are hit by lightning for this show of hubris, at least all your weird porn will be safe.