What Graphics driver are you running? if its Beta? i suggest Rolling to a more stable version. i have had issues with some of the Beta drivers. Optimize your pc, Run in classic mode while gaming could help remove some of the pressure on your CPU.
The game does need some major optimization server end, High end PC’s are struggling making lower spec Pc’s virtually a pipe dream, Think of the potential Players you’d gain aNet.
Lag happens, even on lower spec games, the issue could totally be the servers aNets end.