I own this game on the Atomiswave (it's on my multi shooter showcase cabinet)...
The game isn't nearly as hard as described. I suspect the difficulty may have to do with the gun being used? This game is designed for the shotgun guns... with hand cocking.
I find the game to be a bit... simplistic and overly simple to be 100% honest (again, using the shotgun)... which is why I strongly feel the experience is vastly different between what you experienced (I assume that's your channel?) and what you would experience using an Atomiswave + shotgun.
EDIT: Oh, and you were correct in explaining the title as a B title. It is that... but it's not terrible by any stretch (Sharp Shooter I am looking at you).