Yes it was a horrible run since February. In USD SDICE lost -40%, dividends included! It's rightful to feel bad about that.
That's not correct. If we take Dooglus for example:
He invested
BTC79.9924*$21.5 (median price that day) = $1719.84
And he cashed out
BTC28.3309509*$75.41 = $2136.43
For a USD profit of 24%. In BTC terms it looks very bad of course, but the key when investing in anything is always to diversify. Even though he lost in BTC terms I wouldnt say it was a bad decision to put money in sdice.
I am keeping my SDICE shares and have put some money in just-dice as well. I think the competition will do SatoshiDice good.