This has been a recurring issue with those I play with, and I know thousands others that care about their rank within Arena. My friend just played many games of SWAT and we won all but one, it took 4 to 5 games to get up a level up, some games the progress bar doesnt move after a win or good performance. Yet when he lost one game, with stats of 16 kills, 2 assists and 7 deaths. 15 headshots and 600+ damage dealt. yet he lost an entire bar of progress from one loss, going from Diamond 4 to 3 nearly almost diamond 2. Then myself, I got 17 kills, 3 assist and 13 deaths, dont remember my headshots and i dealt just under 1000 damage, and my Onyx rank went up despite us losing the game. This is just one of thousands of scenarios of this happening, like the time I went from champ 173 to diamond 3 from one loss. How does the system work? What makes it seem so broken? What matters?
How does the ranking work?