I feel sad for anyone forced into an arranged marriage, no matter what the culture or religion. My DH has worked with several Indian men whose parents forced them into arranged marriages when they would have much rather chosen their own wives. Things got very messy when the marriages fell apart.
Things I find disturbing about the Duggars are:
The subjugation of women and the limited roles available to women. If you choose to be a SAHM or SAHD, that's great, but these girls don't have a choice. They've been indoctrinated from a young age, and to them, it would be sacrilege to think that maybe they deserve a real education, a job of their own choosing and a social and dating life.
Requiring the older girls to care for the younger children. I know someone will say, "Well, my grandmother had 10 children and everyone helped out. I see nothing wrong with it." One of my grandmothers also had 10 children, and while the older ones did help with the younger ones, they were permitted to have friends and lives of their own. They were not solely responsible for diapering, feeding, supervising and getting up in the night with a two-year-old.
Lack of faith in the children to behave appropriately. If the children are as devout as the Duggars say, why aren't they trusted to go out in the world, pick their own job (outside of the approved list) and choose their own mates? Why supervise adults to the point that you insist on reading their texts? It's obvious that they really don't trust their children.
The hypocrisy of Jim Bob and Michelle. They got to experience friends, dating, cheerleading and being on a roller skating team and didn't turn into sex-crazed, devil worshipping fiends. Yet, they won't even allow their children to choose their own friends. The parents have the ultimate authority and it's wrong and disrepectful to challenge them. So why wasn't it wrong for Jim Bob and Michelle to disregard their parents' beliefs and and convert to fundamentalism?
Promoting the idea that men are completely obsessed with sex and can't control themselves, so, of course, the women must make sure they don't so much as show a collarbone or a knee for fear that they might tempt one of those feeble-minded men. Meanwhile, the men wear whatever they want. My husband finds it offensive that anyone would think he's incapable of controlling himself if a women walks by with two buttons undone on her shirt or if he sees a women in a bathing suit on the beach.