No Man’s Sky is probably the most hyped indie game in the history of indie games. It was pushed almost like a first party AAA game by Sony Interactive Entertainment, and this caused many to expect what you normally get from AAA games, only on an eighteen quintillion planets scale.
On the other hand, No Man's Sky is not an AAA game. It's a lovely indie survival/exploration game. This doesn't make it better of worse, but it does make a difference in the gameplay elements and style it offers.