For every long shot that comes in on the river that someone loses from, someone wins from the same card.
So by saying the site is rigged "against" me or some other player, you are implicitly saying it is rigged "for" some players.
Now as people are getting "good" beats and "bad" beats in equal measure, why do you only hear from the people who are getting the "bad" beats?
Unless you think people might be predisposed to remember the ropey pieces of luck they have and ignore the times when they get lucky? Maybe??
It's nasty when you go on a bad run. You got 8 outed in the hand you showed. I got one outed twice in 3 hands about a month ago. That's about a million times(havent done the working - GFY) worse than your beat but I still don't put it down to the site being rigged.
(notice how i surreptitiously slip my bad beat story into a post berating bad beats - that's talent)
In the words of Bill Fillmaff bad players sometimes win due to "random fluctuations of dumb luck." You need the beats to be there. It shows there is a luck element to the game. The same luck element that attracts lots of bad players in to throw their money away. Which makes the game profitable if you're good.
So you see, the bad beats actually make you money. You dig?

You also see a hell of a lot more hands online and therefore a hell of a lot more beats...