There is this near success syndrome that is associated with compilation or multiple bets. I'm damned sure most bettors who use the accumulated bet strategy must have experienced this a few or lots of times and it usually feels so disappointing and the day begins to feel like it's not one of your best days. The thing is,
"In an accumulated bet, why is it often the last games that goes rugged and you end up loosing what's supposed to be a best bet and was already preparing for a cash out or the next step"
It's always never funny when this happens. What's the trick about it, is it that, bookmarkers just knows and tends to push the game to the last in the series for an accumulated bet option or it's really bad luck, if there is such a thing as bad luck or other reasons. What really is the trick about this scenario.
Nope. It's literally designed that way.
If you think of each betslip as a negative EV event (which is true for the average bettor since the sportsbook obviously has to make money on spreads), accumulating them using a multi/parlay/accumulator bet just magnifies your inherent disadvantages.
Whether the last bet that you were hoping to win loses or not is entirely luck. No point being superstitious about this stuff.
Remember that human brains take tough losses and represent them as more frequent than they actually occur. So if you are especially distraught after you lose the last leg of your multi, then you are likely to think that it happens far more often than it actually does.