if the gun is sighted in, and your missing or making BAD hits,
its 100% SHOOTER error
I suggest getting more seat time in at the range and BE shooting in the same way as you do from your tree stand
MEANING if your shooting free hand, or off a RAIL on a stand as a rest, try and shoot in the same manor

POINT of aim can happen on HOW you rest the gun, if your gripping the forearm down /pulling on barrel, RESTING on Barrel and so on
SO< its always best to SHOOT from a sight in , as much as the same way as you plan to be shooting in hunting situations

do you get overly excited when a deer walks in front of you, AKA< BUCK FEVER?