Actually I cannot compute the exact amount of bitcoins that I totally lose in playing with gambling games.
But as far as I know, I loss more than I win, and that is because we all know that gambling is full of risk, and most of the time gamblers always loss.
So there Is actually no regrets for me in that way because for me gambling is just an entertainment, and I don't care whether I win more or less, As I am just playing for entertainment