I used to play in 2010-2011 on another account, I left then 3 years later I came back. Many things have changed but most of the PVE hasn't.
In 2010/2011 It NEVER lagged on my old computer (I'm using a better one now). Now some levels are lagbombs. SK messed up somewhere
Any idea why it lags more than it did 3 years ago?
It could be that I'm in the UK and all of the servers are in the USA.
Note: I barely lag in TF2.
If the game has low FPS, that's your computer. If your game is fluid but delayed, that's an internet issue that would be a problem more with your location.
Also, there are some European servers.
Other causes:
just to put those out there
Might be better to put your issue in tech support subforum or seek help from "Tech Geek" or some other siles.
Computer specs?