It's not so much a matter of 'controlling' them as it is getting out the frustration from these undeserved losses you are describing.
You need to find a family member who understands that these things are not your fault and will support this cause. See below for a graphical representation of what I mean.....
You understand I am advocating violence. The simple truth is that with the vast sums of money you are risking here punching a beeaaiiich out sometimes is the only way to prevent total disaster.
Hope this helps. Best of luck with your game and continued success!