Took me a few plays to realize that I don't absolutely hate this game. It is certainly far, far more difficult even at early levels that one would expect, but you do learn a certain strategy after a while. Picking up extra team members (via buying houses) is key early on. Revolvers are also great due to being able to reload individual rounds. And don't be afraid to use grenades to wipe out a small crowd. Still a tough game, but enjoyable if you don't mind restarting a few times to get a feel for it.
As many have noted, the game is easy. If you've played a similar game before (and probably even if you haven't), you'll almost certainly soar through this one on your first try. However, I don't think that's necessarily a negative. Sometimes it's fun to play a game where the whole point is to just tear stuff up! I found this to be a great effort and well executed. The exceptional collision detection really makes this one stand out, as well. Good job.