I'd be a huge, huge dick. That one in the bible? Yeah, he's a pussy compared to what I'd do to people. Fuck being unseen, I'd make "divine retribution" more than just a catchphrase. Some guy is a sexist? Enjoy your new femaleness, hating yourself ftw. A kid is emo, even though he has a really sweet life? Locked in a cage hovering above hungry sharks, who feed on those who've tried to commit suicide and failed. If at first you don't succeed, I'll make sure you die anyway so as not to taint the gene pool anymore with your cowardice. Religious cult worships someone else? I turn their mothers into sheep and their children into the grass their mothers feed on. Person complains about their body? I make them into walrus with only their head still human. People'd learn to enjoy what they had and ***** less, or else.
tl;dr version: The world's probably a better place without any men turned god. Just look at what those who've envisioned themselves as gods over the course of history have done.
