Hi, 

I recently bought Archer C6, because our old TP-LINK went to heaven after 6years. I had a option to limit Bandwith for specific Computers/Devices.
I was thinking that with all the software controlls which Archer C6 comes with, i will not have to control it anymore.

But here we are, while my brother is downloading some games on steam, i cannot watch youtube or netflix on my Playstation 5 because he is eating all the speed.
I tried to play with QOS but, it isnt helping... 

I thought the router will distribute equallythe speed, but actually everytime only one device is eating all of it. 
Not even prioritizng my Playstation or other Device is helping....

Any advice? Or is it a hardware failure?

Best Regards
Michael