Yes, the Treasure Hunt is especially difficult to win, but it's
only because of your odds of picking the correct chest. A 1/9
chance is equivalent to only an 11.1% chance, which is pretty low.
A 1/9 chance also does not guarantee that after nine tries, you'll
pick the correct chest.
I understand that the Treasure Hunt is a teensy weensy bit
annoying, but I don't think it's unfair. This is, however, just my
opinion. ^.^