I paid for an un-finished game many, many months ago. Why isn't it finished yet? its bland and boring. Lacking updates, developers are bathing in money that WE spent on an UNFINISHED GAME THAT STILL HAS NOT MADE MUCH PROGRESS AT ALL. Hurry up garry, you made 8 versions of Gmod, this shouldent be hard.
Garrys mod is a mod of a already completed game. Plus enless your a CoD or Battlefield fan boy it takes much more then a year to make a good game. For example take CoD as a potato chip or something. It takes very little time to make and might taste good for that moment but has little to offer as a meal. When you take something like DayZ or Rust think of it as a nice fancy meal that takes a long time to cook and will be worth eating when its finished.
Bottom line Rust is going to take a long time to be finished because its a new game and not a mod. They also have a small dev team compared to other "Major" Games out there. So just sit and wait for the meal.
Quality>Quantity