I got 5000 Euro last month, that was not the net win, I got 5000 Euro and it had a loss of about 3300. I lose and I win. The math theory says already I must lose. I have some plus, and it can happen, even if we lose "in the long run".
I play mostly with no house advantage. The nice thing was luck, I got a long shot as hit (5030Euro). I play normally daily to try to win 10 to 40 Euro. I win very often, and lose seldom, but yes the loss is sometimes larger when last days win. Total I am fine and even if I like system play, I think I am maybe just being lucky.