@CyberRedeem 

Put your PS4 back on the DMZ, then test the following ports:

3074

27014-27050

3074

3478

4379-4380

27000-27031

27036

You can google open port testers to see if they are open.

When putting a device on DMZ it removes any protection from the firewall, exposing it pretty much to the internet so you do not need to do any port forwarding.

If ports still show they are blocked

Other things you can possibly try is to configure the Archer CR700 as a bridge which turns it into nothing more than a cable modem. Only one device wired to the CR700 will get an internet connection so if you have a spare router you can use that to distribute the internet but will need to do port forwarding on the spare router. You could also just wire your computer to the CR700 to see if that works.

You could log into the CR700 in bridge mode by going to the IP 192.168.100.1 and change the mode back to router mode or you can factory default the device by holding the reset for 15 seconds.

If none of that yields anything then the ISP has to be blocking ports.