What's a massive following for if not for solving your niche tech problems?

My PC has had an insane issue that I've spend dozens of hours trying to fix. Its WiFi just isn't as fast as my Mac's.

Right now, I've got 120mbps on my Mac, and 20mbps on my PC. Steam Deck? Same as the Mac.

I'll post more below, but what's your gut feeling on why this happens?

Source: x.com/mattpocockuk/status/1849906678130524169