Insisting that the house somehow rigs the bets to let you win a low % of your money and then takes it all away is one of the most ridiculous things I've ever heard.
If you observe the rolls in a game, there are groups of reds, (reds mean lost), 1 red, two red, three, four, but during your playtime the longer your play and the larger winnings successive reds like 12x or 20x appears. Well that bases on my experience, players with low capitals always encounters that.
A long streak of reds is supposed to happen every now and then. The chance is low, but it will inevitably occur if you keep making bets. The player's bankroll or total wagered doesn't really matter.