Although I’m losing small bankroll only but it’s still annoying to experience this frequently on slot games.
As far as you are a gambler you don't need to be annoyed by the frequent loses your experience, because that is part of the deal. A Gambler must be steadfast to withstand both win and loses when the loses comes you must bear it as well. Or probably gambling is not for your as Charles Tim said. Don't get yourself walked up. Gamble with what you can afford to lose to avoid having annoying experience.
and one thing is that when you don't gamble for fun then you will find yourself having bad feeling whenever you lose.