She apparently has friends still...
A LOT of kids get bullied when they're younger. Big. Deal. If their parents don't give them stupid names, other kids will. They're called "nicknames" and they tend to be a lot worse than Tula whatever. Yeah, she's starting on a bad foot, but that's not even remotely justifying a "worst parents" title. And she can change her name to something more "professional" when she gets older anyway. I doubt, for her first job, that the Subway GM is going to care about her proper name when he's looking through the hiring list. Hell, it will probably help her get it.
Not even on the top 100 things parents can do to make them "worst parents".