First, right away, my biggest problem is you can tell they put all their focus on their multiplayer. The single player campaign is about 4 hours of a poorly put together story.
Then the game is very glitchy. You will fall through the ground, sections of the floor will disappear, textures will fade and glitch out. Enemies will glitch through walls, and shoot you through walls.
Then their trophies are glitched. After spending hours grinding out their 100k each class trophy. No trophy popped. Then they had an update and said it erased all data, forcing their players to start all over. With all of these combined, this game is a major flop.