Battlefield 4 Very high packet loss on most servers (RecvRate drops to 20hz)

Have you tried a tracert from the command prompt to see if its one of the hops to the server?

In the run box type "CMD" without the quotes, right click and run as administrator, at the command prompt type "tracert google.com" without quotes and let it run. If you see no packets lost, it may be the servers you are playing on. When the servers are stressed I have noticed they will start dropping packets depending on how many people are playing and what map "A close map like locker for example" you are playing. 

Type exit to exit command prompt.