In case this is something of a deal breaker for someone, please try setting up a VM and playing around with Linux. You don’t need to install it on your main system, or try dual booting it, but load up a VM and give it a shot. You don’t have to stick with it and if you don’t like it or it doesn’t work for you or it’s too confusing or whatever, that’s fine. At least you can say that you gave it a shot.

Generally speaking:

Team Red = AMD Team Blue = Intel Team Green = Nvidia

I’m not exactly sure what might be causing your problem, but I’m assuming you’ve tried purging & redownloading KDE Connect?

Another one would be trying to kill whatever process it thinks it running KDE Connect. You could either find it the normal way, or this link might help if you can’t easily find the process you need to kill.