There are so many sins in this movie. I will not comment on the action scene because it's good enough. Not the best, but pretty good. The main problem is the scenario/script of the movie is sucks so much.
1) why the main character not send the proof to the internet at the first place? This is 2015, everybody has internet. At least copy it to your desktop so you have a backup.
2) if I were him, I'm at least show the evidence to my friends or at least I'm gonna scream and gathered everyone on my computer to see the evidence together.
3) when the main character manage to get to the roof and get his gun to the main villain, why he not at least shoot his leg or arms??? its stupid!
4) why the main character must use only one gun??? he killed the villain and their guns is falling everywhere... WHY HE DIDN'T TAKE THEIR GUNS??? I'm really confuse...
5) why the main villain hesitate so much to killing him??? he destroyed the flash drive so why he need him alive??? and when he chasing him, he shoot and tell everybody to kill him. But when he got the chance to kill him, he didn't! why??
6) at the end, the main character recorded the voice of the main villain to make a proof. BUT THAT IS NOT A PROOF! He didn't even mention about "drugs" or anything. He just said about "THIS IS MY SHOW" and some stupid words.
I can give more question. but I think you get my point. This movie is sucks. I'm not talking about the actor or the action. I'm talking about the script.