My Wifi Extender Cause slower speed then using the router itself.

A couple issues. 

1. AC2200 is a speed not a model. There's 2x AC extenders with that speed. One is a dual band, the other triband. Which did you get? 

2. Single and dual band extenders take at least a 50% speed hit of what they receive. Reason why is dual and single band extenders have to use the same chip to go router-----extender and then extender-----devices. And they can't do both at the same time. so they take a 50% speed reduction because of that.  Add on the fact that distance/interference/obstruction also reduces the signal/speeds for where the extender is at and the extenders output is going to be even less than 50% output. 

3. 2.4ghz is sensitive to interfernce. Significanly so. Add in using an extender and speeds can drop quickly. Dropping to 30mbps is bit extreme as even some base model N300 extenders can do 20-30mbps output. Hitting 150mbps on the RAXE is pretty fantastic. Most 2.4ghz devices/routers wont' get close to that. But it could still have intererence. Have you tried changing which channels the RAXE is on for 2.4ghz?

4. What firmware are you on with the RAXE? 

5. The speedtest hardwired into the EAX80 is a good sign. Its meaning its backhaul is getting a good connection to the router. 

6. What band are you connecting to on the Playstation? 

7. What actual speeds are you getting on the playstation? Extenders tend to increase lag because its another connection between playstation and router. the lag might be from something else or a different issue. 

8. what device (and wireless card) are you testing on? Many AX devices are only 1x1 or 2x2 antenna devices. And many don't support 160hz wide channels. 

If you want a good read on wireless, here's a good site that I'd recommend. It goes over a lot of misconceptions. 

https://www.duckware.com/tech/wifi-in-the-us.html