Laggy RF on good desktop but no lag on laptop.

Does anyone know how to fix this? My gaming computer has lag on rumble fighter while my mac laptop has none and are on the same router

 

im not sure i see people have straight 3 bars in the room and when i go into the game i can barely hit the players
what is that code to see ping?

 

The command is "/p2pwjdqhqhrl", any players that you see with over 45 ping, you will see lag.

 

i get 50ms solid and still lag wtf is this was fine with the same ping last week