User blog comment:SuperBen 1000000/How The Flash Season 3 was bad........in my opinion./@comment-24152851-20170605004615/@comment-24152851-20170607065015

Just survive. Rudimentary primal instinct. He made it his purpose to ensure his own existence. Zoom just wanted to live too after getting Velocity cancer, after which he didn't know what he was supposed to do until he got the idea of conquering other Earths.

Well obviously his mind has snapped so he doesn't think rationally anymore. He strives to be a God and to be worshiped, that's what he wants.