Its a great game and there no reason not to buy the game, yes I know you have to buy it on EpicG for the first year but the game still is good. I don't like it either but at least Metro & Co make more revenue like this which in return for me means they could make another metro game. There is no reason to hate the game only to hate EpicG.
The game is great the story is breathtaking and the game-mechanics are good no Stupid AI, no bothering bugs and very good voice actors.

The idea is good, the game is good BUT it lacks content, a long story or a good tutorial. YET what is already has is quite a lot and enough to enjoy the game in the endless mode or scenarios it can be challenging yet satisfying.
In my opinion I can only recommend this game to players who play 'Anno' or something similar, people who like to have challenges and be satisfied hen they survive a storm.