Hi, Several folks will chime in here too. Here is what I see. The most obvious is your string hand flying away from your face. You appear to have pretty good alignment at full draw so that flying hand is an indication that you are using the shoulder and arm muscles rather than your back. It also causes left hits.
Second, your bow hand drops on every shot. You need to keep it as still as possible = don't let it move. A dropping bow hand causes low hits.
Also, in the second set of shots, notice the apparent bend of the arrow. That indicates too much pressure in the string fingers holding the nock. It causes arrow flight problems too.
I don't see that your bow hand is too low on the grip, what I can't see is how the pressure of the bow fits into your hand.
You are a strong looking guy but I would recommend a lighter bow to work on form. Try drawing that bow with a form master and you will be surprised at the strain encountered.
A final recommendation is to shoot at close range without a target and just work on form. Hitting something will come later. (Well, you asked
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