AC68P issues with multiple devices

This router has always given me issues when multiple devices have been connected to wifi. We have what I would consider an average number of devices connected. 2 phones, 2 tablets for the kids, a fire tv and a fire stick. The only things that really stream though are the tablets and the fire devices. What was happening is when the kids were on the tablets it would more or less kill the rest of the wifi. So I moved the router and Im running the firetv wired now.

However we seem to have a...

AC68P issues with multiple devices