Try shooting the gun from a sandbag rest. My best opinion is that your finger placement on the trigger needs to be adjusted, or you are "pushing" the gun in anticipation of recoil. The low left complaint is very common. You could do an internet search on the topic and have enough material to...
As a side note, I don't think the guy who thwarted the robbery has had his gun returned to him yet. Last I knew, he was suing the city of Milwaukee because of that.