I purchased this system to help with speeds when my devices are farther away from my main router. 
 

what am I missing. The remote hubs have changed absolutely nothing compared to my original setup with 1 router. Can someone explain the point of a mesh system? 400mb standing next to router connected to modem. I go less then 20ft away to the next remote hub on another side of wall and it is HALF that speed. Go upstairs to next remote him and it is a quarter of the master hub. 
 

I have to be missing something. Chatted with tech support expecting them to tell me to tweak advanced settings. All I got was advice on just moving the hubs around. That's all they got for me?