Just played a game against someone with 2 stars next to their name, upon googling a star basically means they have reached level cap 100 so the guy I played was level 214!! How the hell you find that much time to play the game already! Career profile said he had played the game 237 hours which basically means an average of 6 hours per day since launch.. :x
Possibly a streamer or just someone who really really likes the game.
I find that it isn't a game I can play for very long stints. Pick up and play for a couple of matches and then do something else.