Regardless of whether or not the air nozzle is misaligned to the barrel, it can't influence the direction of the BB. And you've apparently already ruled out the barrel group.
Are the BBs slicing to the left? Or is the gun shooting in a straight line, but just over to the left?
If they're slicing, it might be that your outer barrel is tilted.
If you couldn't swap the hop chamber, did you swap the nub?
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