Even when I fully believed everything, their whole approach to dating seemed so ass backwards to me. At least to me, there's a difference between dating and being in a serious relationship. Why would you even be thinking about marriage when you're in the beginning stages of a relationship? You're trying to determine if you're even compatible at that point!
The whole "chaperone" thing was also flawed. It's just not a good way to get to know someone. Of course people are going to be on their best behavior in front of their parents (or "mature" Christians who will snitch to the elders). If you're going to spend the rest of your life with someone with no way out, you better do it right. Holding back on genuinely getting to know each other and just rushing to get married is just crazy.