It is really bad luck as bookmakers have no real power in the outcome of a sport event at least in theory.Most of the times it is our own greediness which tells us to add this game too and another and another and this leads to the multi bet going lost,often times in that last game we placed.It is never funny I agree and it is simply bad luck nothing else.
Bookmakers are just handlers of bets not totally a thing that can really affect a certain games outcome.I don't know why some people do think that
they do can really affect the result which its not that relevant to think off.Its just pure bad luck and just because of greed and that kind of impulsive
reaction which makes the situation even more worst.
It doesn't matter if its single or multiple as long you do know those certain games and you do know on what you are doing.
Don't make any blames to others just because you have lost.Just move on and bet another one which you do seem fit into your criteria.
Because if you will linger on your losses, you will go crazy thinking about what should have done or should haven't.
So better move on fast rather than think about your bet over and over again.
Just admit that this is how gambling really is. And yes, bookies don't have anything to do with the results.
If you can't handle the stress, just look for other games that will calm your senses.