I read it. 76% win rate (if by win rate you mean ROI, if it's cash games I have no clue what win rate means) is ridiculously high, as is 52%. I don't believe you kept a 52% ROI but if you did you should not be complaining. The point of randomness is that unlikely things will happen, just not as much as the more frequent events
(HINT: I'm starting a new paragraph because I have a new idea, the enter key is the big one near the right of your keyboard)
First of all, most likely the hands that were runner runner straights they had more outs. You can't make statements about it being unlikely after the fact, that just makes no sense. Then I could say "wow, this site is rigged, I got the A of spades, 4 of diamonds, 6 of hearts, 2 of clubs, 5 of diamonds, 8 of clubs, in that order. Odds of that are (1/52)(1/51)(1/52)(1/51)(1/52)(1/51) = 1 in 18.6 billion times, omg it's impossible!!! Next time you get those 3 hands back to back complain that the site's rigged. Oh right, you can say that about ANY 3 hands. The point is, if I decide on this hand BEFORE the deal and get it, either I'm extremely lucky or it's more likely I had insider information. Yet if you wait until after the fact, I can make a point for something that unlikely happening when it's just 3 normal Texas hold 'em hands.
Secondly, I don't know the exact percentage, but say it's 1% (I think it's higher, especially if there are 3 in a row. If they have to be the exact 2 cads, it's (8/47)(4/46) = 1.5%. If there are multiple possibilities (345, 346, etc.) it's more likely.
BUT... if something happens 1.5% of the time, that means that considering you play a ton of hands, you will see it happen several times. In fact, if it doesn't happen there would be a stronger case for it being rigged.
FINALLY... your accusation of rigging and if you had a
poker site. You think there are complaints about action now with no proof? People already think bad beats happen more often than they do. Imagine if they started happening at an even higher rate than normal. People already think a runner runner will hit against them at least 50% of the time, just because it happened once. If all of a sudden they do hit more, even normal people would think it was rigged. Also, people with pokertracker and such would be able to find out that their RNG isn't actually giving a correct distribution of random numbers over long periods of time, and people would stop playing online (more than the stat idiots who do already).
Probably was a waste of time to respond, but I guess it's too late now.