If you are on WiFi some, not all! ISP supplied modem+routers can be sub par.
To test out if it's the WiFi or not, use Ethernet to connect the PS4 and test.
Port forwarding shouldn't be required. I have run into some gamers that want to host a game so maybe for them but PS4? Shouldn't require forwards.
HOWEVER https://www.google.com/search?q=Fido+CGN3AMF+slows+down doesn't give me much hope. Maybe they are just slow or throttle after so many megabytes?
Hi so I recently switched my router from Rogers to a Fido CGN3AMF. I play games on my PS4 but as I recently switched, I got a good plan with good speeds. But for some reasons, my games lag a lot, my wifi speed is slower, and unlike my last router half the things in the port forwarding section of my router arent there. This happened a couple of days after purchase and from like 90mps I have gone down to 8mps. My ping in games is usually 90 or higher now. What should I do?