No movement forward in the story - Starting awesome storylines in codexes but not advancing them. The Golden Throne failing for example.
Too overly grimdark - I'm up for a lot of dark but not the no hope at all setting. This is why I like the "winning against all odds" stories like Gaunts Ghosts.
Chaos being all powerful and corrupting everything good like positive emotions such as hope, honour, love and refusing to give up.
"No, I don't care if it's 'fun', you are not attempting to shove your USB stick in my Scart socket....."
"It won't fit" "That's what they always say first time"