same servers i have joined on other games and lagged from time to time are the same servers that have problem on this game too.

most likelly some of those servers dont meet the hardware requirments or with good internet connection on that time.

picking a small latency server ( 0- 100 ms ) is better

picking a server with max players ( up to 8 or 10 ) is better

u cant be in europe and expect to join a server at texas or australia and have a good game, most likely it will affect the rest of the players game as well.

well if u want to play with your friends that u are between these big distances , lets say east europe and west coast usa u should split the distance lets say picking a server at NY or London

If your looking for a server its very important to choose one from a provider that knows what there doing, we worked closely with the devs over at SplashDamge in the immediate run up to release and noticed at least one things which we had to change on our servers which significantly helped reduce lag.