Please, by all mean, join the class action lawsuit. They will claim that you agreed to the Terms of Service that said that they could shut down the game at any time for any reason. There is no theft, when what you paid for was access to a service. You can't just demand that companies only sell you what you want, or even give it to you retroactively.
What you can do, is to demand transparent, non-deceptive, and fair terms of service. What you can also do, it to speak with your wallet and refuse to play online-only games. It's not a human right to play games, you know.
This is so out there. Having a car is not a human right. Therefore I'll now take your car and sell it for parts.
I will also claim that you consented to that. Suddenly there is no theft!
(When I paid for the game, there were no ToS to sign either, so it's fair.)