I think the title is pretty clear. Basically, come up with a sentence that'll just grind the gears of the Key fans reading it, new and old, anime only or having read visual novels. Something that makes you feel like this when you read it:
A little tip is that ignorance will probably be more successful than straight bashing. Also, please refrain from spoilers.
I'll just kick us off with a simple one: Having seen all of Key's shows after watching Angel Beats, it's so cool to see them getting remade into picture books on Steam all these years later!
This isn't perfect, since it only really targets VN elitists (and has a gross verbal redundancy), but it's just an example. Covering all your bases isn't easy. Let's see what you've got!