Nothing is sure about it part luck part timing when you place your bet after changing game, there's no guarantee at all that you'll surely win.
Yes, you are absolutely right, the only thing is that when you finish the game your mind will no longer remember how to play the Previous game , in some way the brain rests from that game that could have tired us in a Moment both because of the complexity of the game and the loss of money that occurred, it is the Only thing that can change, otherwise the possibility of winning is subject to the factors that we have always known, luck , skill, strategy , Among others.
Indeed, the influence of luck and good money management will allow you to earn or to win but if you failed to acknowledge opportunities then the outcome may still be the same, you might win some of your sessions but if you continue to push and seek for more, then you might lose it back and suffer the same fate as what happened to your previous games, it's the timing and how you will take the opportunities to control yourself.