Slots is not rigged, not at all. It just happens that our luck never stays long on our side. That is why after short wins, losses come. Now, if we're too greedy and thinking there are more winning bets we can get, that surely ends up losing everything.
If we have been gambling for quite some time, I'm certain that we know how gambling works. It does not just happen in slots but also in other games. Why? That is how gambling is meant to be. We can't duel in a game of luck, nor say it is manipulated because we know that luck has never been with us forever.