Wifi hot spot gaming

I use this hot spot (ZTE Z289L) for my ps4. I have done everything I can only to receive unsatisfactory results. I am here to ask why you are blocking certain ports so that the game play is so behind that it is not even usable. I have also made calls to the straight talk tech. team with no avail. Unfortunately the tech. team does not know anything about this product and how it works. (except for what is in the manual). I have changed the firewall setting ( Port forwarding and static IP)