Ahh yeah the provided router might not have some of the more advanced features. But suffice to say this isn’t so much a steam problem as it is a “how computer networks work” problem. The way routers work by default tends to penalize “bursty” traffic like loading websites/gaming/voice and prioritize sustained traffic like your download, so it’s nice that valve provide the option to limit the bandwidth. I’m on satellite internet right now waiting for verizon to finish their fiber install and I can’t even use that reliably because my bandwidth changes constantly D=