Neither Lara or Martha Wayne should be on the lists at all. We don't know enough to judge. If anything, based on the recent story I'd say Martha should be on the best list.
By their standard, I suppse every mother who gives her child up for adoption so they can have a better life is a terrible mother. I'm suprised Steph wasn't there. -_-'
After next week, I'll decide where Lois belongs. She was okay with Chris when he was six, but it's not every day that your missing six-year-old foster son shows up as a 16-year-old badass super-spy clutching the dying body of his friend. That's one of those moments that tests your parenting instincts. XD
Also, man - Trigon, Slade, Cain, and Ollie will be providing some harsh competition for the worst father poll. I also hope Thomas Wayne makes it. Unlike Martha, he's been proven to be kind of a jerk towards young Bruce.