Board Game Arena

How does this system work exactly and maybe change it?
Winning a game give +6 points but losing a game gives -20 ?
I feel it is unfair for someone to grind up rankings then lose a game and drop down so much.
Maybe make the points be same for winning and same for losing? +6 winning , -6 losing ?

It's the same as ELO https://boardgamearena.com/faq?anchor=faq_account_elo
You win against a lower-ranked player, you win few points. You lose against a lower-ranked player, you loose many points.
You lose against a higher-ranked player, you lose few points. You win against a higher-ranked player, you win many points.

nazghul an thes Ella na peksoume mazi