@Marcus81 

I would either disable the 2.4G so every gaming system was forced on the 5G. Another thing to try is to get a simple network switch and wire all gaming systems to the switch, then connect the switch to the Ethernet port of the given Deco.

You could also try setting the QoS in the Deco app so gaming is turned to the max and others are lowered.

@Tony 

Thanks för the answer.

The problem is att an standard ps4 dont support 5g. I dident try the ps5 att the time. But an Xbox was in The wifi and No lag on the system. I have tried the settings with QoS and nothing happend. I dont think i should buy an Network switch to play when i have bought theys? Isent that just to say its crappy products? I have used and installed 10 brands before and newer gets so much lag spikes. The reason i have used so many products is that i work as an it security techinchian. 

Hope it come to an solotion soon.