How much time have you spent on this in total?
More time and energy than I should have, honestly. At this point more out of sheer spite towards Microsoft (**** you! Who do you think you are to tell me what I need or don't or what I should be using or not?!) than because I really really need it. Its useful, but can I live without it.
My advice, try again tomorrow but at the first failure put it on hold and walk away.
Have a good think, do you really need this? You might even get a "AHA" moment and realise where you went wrong, if you did of course.
Remember, defeat is summat you find at the end of delegs, nothing more.
But I managed to find the issue at last.
Future me, pay attention to these:
1: Never buy a ******* samsung device ever again. Never Ever. Their software kills whatever advantage their hardware can give you over competting brands unless you sell your soul to them.
2: Miracast needs:
Remoting and Privacy >
Device Setup Manager | Gerenciador de Instalação de Dispositivos
Multimedia >
Capture Service | Serviço de Captura
Network >
Quality of Service Package Scheduler (QoS) | Agendador de Pacotes Quality of Service (QoS)
Link Layer Topology Discovery Protocol (LLTD) | Protocolo de descoberta de Topologia na Camada do Link (LLTD)
Internet Conetion Sharing | Compartilhamento de Conexão da Internet (ICS)
Application Layer Gateway | Serviço Gateway de Camada de Aplicativo
Windows Connect Now (WCN)
System >
Consent UX
Shared Experiences (Video Settings force closes at connection without this) Not Needed anymore
Apps >
Capture Picker
PPIProjection | Connect App
Finally, make sure your test is unbiased by working with a device that... works, before you assume the problem is on what you're doing. It was all samsung's fault. It failed to do telemetry, it refused connection. Its not a standalone issue of mine, apparently there is a whole forum filled with complaints because their shared screen (multiple miracast devices at once) cannot be disabled and keeps any windows machine from connecting on Q series. What use it to connect two miracast devices at once if I can't connect one for that?!