Don't worry about all the low ratings. When this game was in early access, yes, it had glitches and could be quite difficult to play, but now, in full release (and with expansions), it is an AWESOME GAME!
All these poor ratings seem to be angry because they were either not very good at the game, had poor internet service, or underperforming machines.
I played this game alone for about a year (in early release) and then began playing in guilds (through release and expansion).
The game is beautifully balanced for difficulty. Yes there are going to be exploits that people take advantage of, but that's not the game or the developer's fault. Learn the mechanics of how to play and defend against those exploits.
I have over 2000+ hours into this game and have built many fortresses, cities, and compounds. No one has been able to break into my creations the same way twice.
A+ Game. I highly recommend!
Gets even better when you play with friends!