Steam Community Moderator for Insurgency Sandstorm, World War 3, PAYDAY 2, Battalion 1944, Black Squad, John Wick, Raid World War II, and Overkill's The Walking Dead. Past Experience: Warner Bros, Activision & Skydance Interactive.
Community Moderator for Insurgency Sandstorm, World War 3, PAYDAY 2, Black Squad, Battalion 1944, and others. Previously: Warner Brothers and Activision. Opinions are my own.
While I understand that the game has its issues, I feel that list of negatives isn't a good representation of the game. The game is in a functional and stable state to play enjoyably. The game will only continue to get better with time and continued updates.
If you recently installed a new driver and are now experiencing the FPS drops, then it's probably the driver. One thing to bare in mind, new drivers doesn't automatically mean the're the best. I'd recommend reverting back to the old one and testing it again.
Your system is lacking massively on the RAM. Most users have 8GBs and even they sometimes experience performance problems. However, I think your CPU and GPU are very low end as well. Unfortunately, I don't think there is much we or you can do unless you upgrade your components. I'm sorry.