OP, FWIW my experience ended up being almost exactly the same as yours. I probably played almost exactly 30 hours of O8 this week. That's only about 800 hands. And I also finished the week down about $300.
I think my favorite hand was the first hand of my last session where I got to build a 7-way capped pot (and at the Orleans the cap is FOUR raises, not three!) with A23T with a suited ace. I flopped a nut low draw with backdoor NFD, turn was a high card that gave me the NFD, and the river paired the turn card. Naturally I pushed my equity all I could on the flop and turn, and equally naturally I got nothing LOL. You should have seen the mountain of chips that comprised the final pot.
Another one was late that session when I completed the SB after 6 limpers with 99xx (don't remember what the xx were), flopped 9s full of 10s and a villain made 10s full of 3s on the river (that's not actually a particularly bad beat - if he flopped trips he had 9 outs to a better boat).
Anyway, if you estimate that 18% of hands are playable (see this post to see where I got that figure:
https://forumserver.twoplustwo.com/s...72&postcount=9 ), on average I'm going to get dealt 146 playable hands. BUT: Most of those playable hands are only playable in late position after multiple limpers and when NOT facing a raise. So, conservatively, let's cut that in half and say 73 playable hands (though in reality the number is probably lower than this).
So over 30 hours, I'm already looking at BARELY playing 2 hands an hour.
Let's say, conservatively, that your hand NAILS the flop 1 time in 3 (in reality it's probably less than that), and still has a strong chance of winning at least half the pot on the turn 1 time in 4 (again, that's probably optimistic). You're already looking at one pot every 2 hours and we haven't even accounted for getting phaserblastered by the river.
One more factor to bring in - I had to table-change several times at the Orleans because I kept getting stuck at tables where people knew what starting hands not to play. There's a huge overall difference in getting dealt good hands when you're going to get to play a 6-way pot vs. stations and maniacs and when you're going to get a 3-way pot against people who actually have some clue. With that said, at least from my observation there was always at least one juicy table SOMEWHERE in the poker room and I never had to tablechange more than once to find it.
The point is, a 30-hour card-dead downswing actually isn't at all improbable.
I just wish I'd done all this math BEFORE I went to Vegas so I didn't come home so disappointed.