I am on the same boat.
After i set the power mode to best performance and turned off the power save mode in adaptor, the problem improved a bit, yet completely settled....
I have another old win 10 laptop, its wifi connection is much much much better than this stupid win 11....(same router, same isp, same remote mouse, even sitting on the same spot on my desk)
I spent ~ a month doing reading searching fixing....the problem still not be solved, not mention to that I lost a marauder ship and almost lost another carrier in EVE due to the wifi disconnection....the monetary loss was not a big deal, but this made my killboard much worse....i feel sad now almost gave up enjoying the game, and changed my gaming habit now.
I have no idea why M$ care much more about the carbon emission than whether your product being working or not...
I have to tell you M$ i have spent a lot of electricity to fixing YOUR problem. created much more carbon which should not be created during the process if your product is fundamentally working....See it is ironical when i saw the " power consumption and carbon emission" option emphasized in settings.
Perhaps i should skip your next product, and make myself ready to embrace your rival