Firing hundreds of rounds with a 90% miss rate is standard for cops.
As a competitive shooter, I have helped a lot of cops learn to shoot. I could take the average guy who has never held a handgun and in one day I could teach him to shoot on a level that is above most in law enforcement. The only ones who are shooters are the ones that are ‘gun guys’ and shoot on their own. Most are of the pray and spray type.