I'm on arena level 6, which describes the chance of a common chest as a "fine" chance, and it also describes the chance of a rare chance as a "fine" chance. To me, when you use the exact same word to describe the drop chance of both items, they should have a similar drop chance.

However, out of the past 32 chests I have obtained on level 6, I've gotten 31 common chests and only 1 rare chest. To me, it seems like that's broken. That's a 97% common rate, and only a 3% rare rate. If they're both a "fine" chance, shouldn't those numbers be a bit less overwhelmingly one-sided? I've also gotten 0% epic chests, but I'm willing to accept that, since it is only described as a "tiny" chance.

think of it like comm 60% rare 35% epic 5% on every win. even on my old account I'm on lvl 9 I get 1 or 2 every 4 wins and epic ever 12 or so wins.