Digging through the forums, I found this guy who seems to have the same issue:
http://forum.ets2mp.com/index.php?/topic/225-server-problem/
Could it be server-side or something regarding my ISP? I've checked my router, nothing seems wrong, I have no issues with anything else. Hell, I even shut down wi-fi altogether, but to no avail. It works every now and then, but it stops receiving data eventually and if I try to reconnect, either I don't see anyone around, or everyone is static and showing 0ms in the scoreboard.