Id say lower the weight and do the exercise properly and then comment if you like it or not. Currently that is too much weight and all reps apart from the first one, you are pulling elbows in, meaning focus comes off target area.
Leave the ego at the door son.
Well let's see , every single rep is a full ROM with the chin clearing at least 4" over the bar. So no I wouldn't say the weight is too heavy when every rep is full ROM and controlled.
When it comes to hitting the target area (which would be the lats ), how the hell can I get pump and soreness in the lats if I am not hitting the target area.
Also, what muscle do you think is the main mover during those reps if I am not pulling with my lats, biceps?