Server issues on official servers.

This past Friday I was playing on the FNG servers that could be found via portal and I have to say that this was the first time I truly enjoyed the game fully. The mouse feel was direct, the hit reg was fantastic and there was no desync what so ever. You felt connected to the game for the first time and it was a consistent experience overall, the full 24h those servers were available. 

Then those servers shut down and it was back to the "official servers"...

The difference playing on the official server is truly amazing and horrible at the same time. There's massive desync, it feels like everyone has wall hacks, it feels like you have 100% mouse acceleration on making it super hard to track enemies, you get shot around corners, inputs sometimes stops working completely(both mouse and keyboard) and you receive all damage in milliseconds and have absolutely no chance whatsoever to dodge incoming damage. RPGs go straight through helicopters and the hit reg in general feels like a lottery. I even knifed a dude 5 times sitting still from behind for him to turn around and kill me in one frame.

So, what's the difference between these FNB portal servers and the official EA servers? Why does the official servers play so horribly bad? Something is definitely up and it would be great to get to the bottom of it. Why? Because this game has the potential to be a positive experience, not the inconsistent mess that it is and has been since post beta.