Reading a good to great fantasy novel makes the reader feel like they've been swept up onto the back of a pegasus and flown to another world, where magic, intrigue and danger abound.
On the other hand, reading bad fantasy is like watching an episode of Barney, because you always know what's coming next as you wait for the monster to remove the mask and reveal the idiot inside.
That's why bad fantasy is best read in teeny, tiny snippets, so you don't get disillusioned and decide to give up on the genre altogether, and the best place to read bad tidbits is the Awful Fantasy Twitter account.
The Awful Fantasy Twitter account is full of horrible excerpts from fantasy stories that weren't actually written and will thankfully never make it into print, and just like smoking pipeweed it's easy to know your limits.
But if you take it one terrible toke at a time you'll soon find your love of fantasy renewed and reinforced, and the hilarity of those bad entries will stick with you like a Necromancer's curse.