I first started playing at PartyPoker back in the day, but like most people who are new to online poker, I thought I was great and should win every hand. When I lost, I blamed the site. I've since got alot more realistic about playing, as well as alot more patient.
A few years ago, I switched to Bodog ( cool site ), but it seemed everytime I got up up a decent amount of money, they would give me a great hand... that would NEVER win! ( How do you lose to a higher fullhouse 3 hands in a row? ) I swear it happened. Oh, and I flopped a Q's over J's boat once and lost to a straight flush... but the bottom line is, that shit happens. No matter what site you're on or where you play. Or, for that matter, how good you are (or how good you think you are.)
Now, I play on PokerStars. I like it alot better. Still feel like I'm getting screwed with the occasional ( or all to frequent bad beat ), but I'm up a nice amount of money since I started and I like the "Turbo" tournaments and the $1-$2 No Limit Live action tables.
I'ts not the hand you win that gets you to the final table, it's the hand you don't lose!