So our game (Z&BOX) got very "mixed" reviews, as you can see

Personally for me, as a developer main problems of a game right now is its bad ability to handle many players on a server. With standart zombie and loot amount per player server barely can handle 3+ players at same time. But its seems not like main issue because as far as i can see most players played in singleplayer.

So our question (as me developer, and people who helped me with testing): Whats is main issue for YOU in a game? (You can answer in comments)

A) Bad network
B) Lack of assets in game (Game uses only standart S&Box models and textures because we dont have a 3d artist in a team)
C) Lack of a goal/content in a game
D) Bugs (Such as zombies puches player into walls, weapon gravity, etc)

Feel free to mark multiple problems