I cant agree with everything you said.
1. Dlc weapons are overused and overpowered - Just plain wrong, m16a3, m4a1, m27iar, and m98b. All come with the original game and all easily the strongest weapons for each class. ( although every gun kills in like 2 secs anyway)
2. The hit detection is kinda meh, Dice decided to use Client side hit detection, this means that people with 200 ping can shoot you and kill you because on their screen your not behind a wall. Its a poor decision by dice/ea and its undoubtedly frustrating but it works both ways, so you cant complain to much.
3. Bad spawn - Only one in every 20-30. If you spawn on a teammate its most likely going to be in a combat zone, so you take that risk.
4. Rpgs are somewhat silly, unless you get a pretty accurate hit with it they'll survive. If this wasnt the case you'd prlly see alot more rpg whoring. So its alright imo.
And whoever told you this was a military simulator, they're idiots. This is a game designed to be entertaining. Its got elements of real life things. but at the end of the day its meant to be entertaining. If you want an military sim, I reccomend Arma II, or wait for Arma III. Thats actually designed for realism.