Problem with the plot. So, he killed....
...like 2 main bad guys. Josh Hutcherson and that guy from first facility. Maybe there was middle boss from second facility.
Then killed like who knows how much secret agents of whoever that was. Some security people. Who basically just people on hire and not villains. They probably didn't even knew what they are guarding. Also some SWAT team.
But... he let go all those scammers! And they are the real villains. And none of them will stop. They will just go to work on another facility. Two times he entered room fool of the people who literally steal money from people. And he just lets them go. Instead of killing all.
And keep in mind that he doesn't even know who scammed his lady friend. It could be any of those scammers he let go. I was just rooting for him to kill them all. They are scum of earth. I was angry at him for not doing it.