Trying to figure out when I try to setup this dual band wifi router in AC mode, why my speed is below 100mps. If I plug laptop into ethernet cable - cat6 all the way back to Modem/Router I can get 350

So what is the deal with your slow wifi? I see all the posts here and you all keep coming back, "Oh, get closer, signal strength, turn off smart connect, wifi speeds will sometimes be half the wired s