The game is unfinished. There are many features that have not been fully playtested, balanced, or well implemented. Take multi-player, like the OP's example. It's pre-Beta. They would have to work at it just to make it Beta. That's one example of hundreds.
Graphic card issues are a hardware problem. Something that can be caught in playtesting, yes, but not always. Blizzard & Valve games often come out when they're well & finished, and many of them still have hardware issues. Not so much gameplay issues.
The OP's topic is mundane, but it's his right to ask. But that response is like responding to someone on the street protesting a war with, "Veteran health benefits need to improved!" It's only tangentially related.