A lot of Sia's own songs are a little overproduced. But Pretty Hurts just has a very very weak melody (it's like it wants to be minor, but it sounds major) and the production is very uninspired. Nothing exciting happens with the music.
It's just not good. The bridge and outro are the only good parts.
I only use the remix... sorta.
I guess I just don't like the vocal melody.
This is a great remix. I use the covers on YouTube. Some of them are very good.