If your internet isnt up to a certain speed then you cant play fifa online. Because so many people play with adsl1 and 2 and even use their mobile phone to hotspot and it slows your opponent down and gives them worse speed.
I have 100mb download connection and 40mb upload hard wired to my ps4 and get button delay every single game. So i decided to do a mobile hotspot and i get hardly any and i get messages from my opponents saying they lagged bad.
Its really unfair and EA really need to fix the way players connect to eachother next fifa.