The worst songs on ARTPOP are Donatella, Swine, Jewels M Drugs, and MJH. I don't use MANiCURE either but I respect it's potential as a single and recognize it is objectively good.
Dope is worse than Jewels & Drugs, in terms of their instrumentals
But Dope's lyrics (aside from the need-you-more-than-dope reprieves) are the best on ARTPOP. Sexxx Dreams has great lyrics too but you can't really hear them the way the production beats over them.