The American villain is kinda dumb in foresight. Sure, she hates men for fair reasons, but her plans to make the world reproduce with just women are not even certain yet. She has no solid evidence of her plan even working and she's over here killing off every male she encounters. So, either she finds a way and it works or she fails and is the dumbest villain of all, dooming every single female to eventually die without kids.
Other than that, it's an interesting read for a "What if you're the only male in an all-female" world with a side horny.