[Closed] 2 hands = End of Tournoment?

I just had a good tournoment, placing ITM, finsihed i think 89th outta 4000 for a good few dollars..

but my tournoment ended in 2hands.. I went from 10k above avg chip stack to 0 in 2 HANDS!

Is this common? I had 66, i was BB 3200 more to call an all in, i had to do it.. and it was 66 v AK, he hit K on river.

Next hand i had 99.. from the big hit, everyone folded i went all in..

Guy called with TT..

I dont understand.. how a whole tournoment can be thrown away in 2hands.. How would i avoid this, or was it just simply bad luck?