All gamblers or most gamblers would want to win all their place bets in a game, that, for them is the real excitement and fun of it but yes, it is impossible to always win in gambling. There will always be someone who'll lose in order for someone to win, if not you, maybe the gambling company/site, that's how it works and we can't avoid that.
Gambling site loss but they don't lost most of the time, so they will still end up being profitable.
They have the system in place that makes them profitable and that is the house edge, and it's been a reality that no one can beat the house edge and even if you plan on taking down the site with your big bets, it's still not gonna happen because they can set a limit on your bet.