Welcome to my life. The thing is, bad beats are a part of poker. And they are esp. a part of community cards poker, ie omaha and nlhe. Stud has more control, but in these community games, there are nearly always 'outs' as I am sure you know. I would say, if you are getting your chips into the pot when your hand is ahead, and you consistently are getting drawn out on by weaker hands, or worse yet, very long shots, then maybe two things are happening;
A)Your only noticing these times, and forgetting the majority of hands when statistical probability runs true, or
B) You are on the bad side of a downswing, and its time to hang em up for awhile, or just play super conservative til the bad run has completed its course.
I know there is plenty out there about the patterns that ppl see at FTP, or stars, or cake, or...wherever you play. And I can't disprove these claims. Nor do I claim that I have never noticed some funny 'Rhythms' in the way 'setup' and 'cooler' hands are played, and rivered out, but I believe that there is no long term advantage to the house controlling cards. They make such a great rake on cash games, and 10 percent on all tourney entries, why would they risk that massive profit structure for fixed result that would ultimatley be their end? Given the bad reputation that would follow and destroy their client base if they were caught, I find it unlikely. Given the provability, and the constant attempts to prove/disprove such by places like PTR(poker table ratings dot...), I think there is a very low chance that the games are rigged. And given that even the most skilled, genius-type, math savant-esque players go on downswings too, I personally think most of the major rooms are on the up n up. (With the exception of the cereus network)
But to answer ur question... All the freaking time

Which would you rather see first, my collection of youtube 'badbeats' that litter my harddrive? Or a picture of my drawer full of laptops that met their end with my fist, the wall, or the floor when some donk's two outer matured on the river?
I once had a cabbie who besides taking me home from the card club, would listen to my bad beat tales when I was running bad. He said one time, after my quad 4's were out turned by quad 7's (and in SJ CA where bad beat jackpots are illegal), "only good players have bad beat stories. I never hear a losing player telling me how he got drawn out on the river after making a good read and a huge bet." When I think bout it, he was right. So if u got some bad beats recently, shake it off and remember that.