Does Blackjack teams have an edge in tournaments?

I played and witnessed  Blackjack teams , I know they exist  to help each other   eliminate other players like me. For Example , I had an opportunity  in semi- finals to make final table, but I new I had to hit on hard 15  to make final table to give me a chance. The player to my right  did not have enough chips to make final table no matter what she did, she was looking at my chips and decided to hit on 19,  the card  came out was a 5 , would have given me a 20 and a chance to move on,  I got a king instead , busted out, I got  little emotional  and yelled at her for helping her team members on the end make it to final table.  She just stood there quietly like nothing happened, so obvious .Maybe it's just me,I have great instincts on  other players teaming up sometimes,  I was right that time.

Richard C