Help with XR500 Ping Spikes in Dota

Hello everyone first post.

So i've got a BT Home Hub 6, problem im having is getting 35 ping in Dota 2 when its just me using the internet. As soon as someone starts streaming i get ping spikes every 8 seconds upto the 130ms resulting in Dota 2 stutters.

Watched a few youtube videos and decided i liked the sound of the XR500 to manage the network. So i bought today the XR500 and a TP Link TD-W9970.

Been playing with it all for a few hours getting it set up and everything works nice and fast except the problem still happens, maybe even worse now.

in cmd i pinged 146.66.152.2 (Dota EU East) and got a steady Min 33ms Max 34ms and Ave 33ms

with Netflix on iPad for example Min 33ms Max 418ms Ave 88ms, feels like every 8 pings there is a spike

in cmd i pinged 146.66.152.2 and got a steady Min 33ms Max 34ms and Ave 33ms

Internet -  UK BT FTTC  44 up 15 down

Hardware - W9970 in bridge mode ethernet cable to the XR500 then Cable to my PC.

The TV is also cabled though a TP Link Powerline but ic could even be a wireless iPad that causes this to happen.

In QOS i've set my 70% up and 70% down my PC i've set to 50% band width up and down. I even tried it at 100% and is still didnt help.

Am i missing something obvious? Starting to feel a bit foolish buying these devices and having these problems. Any assistance or advice would be appreciated.

Thanks in advance Mike