Why the lag in online servers?

[Black_Sage29]

My specs are:

Intel Celeron 900
2 Gigs of Ram
Intel GMA 4500M

It's an old laptop but I can run this game smoothe as butter OFFLINE


When I get online the game lags so much it's pretty much unplayable. Specifically when there's a lot of people in Battlefields 1 server and especially IRSS Dogfight server.

IRSS Dogfight I expect some lag because it's a russian server but Battlefields and Skies of Valor are closer and I ping pretty good there...yet there is still tons of lag especially when getting around other players

When there's not a lot of players in the server the game runs pretty smoothe even on the russian server. But when more players join it gets really choppy


I have fast cable internet so my connection can't be the problem. The lag is so bad it's forcing me to stop playing the game all together