Windows 11 File Sharing on Home Network With Win 10 , & and Older Devices

After some months with Windows 11 Pro I am at my wits end with it.  Nothing but trouble and problems.

The main issue I have is that unlike all my other PCs the Windows 11 Pro box refused to display the other devices on the home network so that I can map to the drives and folders that are shared.  All except my old Server that seems to pop up, but that is NOT good enough when I want to pass files direct between machines as I've always done.

I am tired of trying to fathom the acronym ridden spoutings about the KB5065426 Windows update that was issued in September 2025 which stills seems to be the primary reason given for the rubbish performance of Windows 11 file sharing.   Is this still really the case are MS so bad that they can't be bothered to fix the issue in a way that is comprehendible to the average user?    

Already their Midi devices update that was dumped on people in March  wrought havoc with many InMusic devices, what with this and the mess of the start menu and trying to find things, noting the latest update screwed that even further, is making me think that Windows 11 should be binned and revert to Windows 10 as the new stuff is too much hassle.  

Any ideas that can do better than the many incomprehendible posts about SMB and more as hack to fudge the system would be gratefully received.