I've been thinking of a new theory... You know the kind of guy who has a weird personality but only goes after the really hot/younger girls? And gets rejected a lot or ditched after a few weeks? The kind of guy who doesn't understand that he will never find a mutant mix of his mom and a barbie doll?
That guy gets bitter and misogynistic, and ends up making no efforts to meet anyone. That guy hits the gym for self-reassurance but believes there are no good women out there anymore.
I have a feeling some (perhaps not all) the Arndt men fall into that category. Maybe they've been rejected a lot because they're not going for the right girls. Something tells me they're pretty shallow and would only settle for a gorgeous, giggly, completely adaptable (read submissive) girl. Their way of life and "family culture" seem extremely rigid and they don't seem ready to change that for a woman.
I could be totally off the mark and they're in fact these adorable goofy guys who would love to pair up with other awkwardly cute Christian girls like the 7 Sisters, but I kind of doubt that.