The house edge is nowhere near the levels that you put in your post, if you are playing in a European roulette the house edge is only 2.7% and if you are playing in an American roulette than the house edge is 5.26%, despite the small size of this house edge mathematically this means that over the long term it is going to be impossible for you to beat the casino, but if you are playing for fun, as you should, then this is not a problem at all and you can gamble with an amount of money that you can afford to lose.