The Titanfall and Titanfall 2 games have been enduring a ongoing DDoS attack. Its not all together clear why the servers are under attack. The game is now completely unplayable.
Other EA games are also apparently being attacked by DDoS bots as well. Players on Steam suggested games work intermittently at best while game reviews are overwhelmingly negative.
Respawn had tweeted that they are aware of the problem and that steps are being taken to mitigate the problem.