Second marriages generally come with more baggage (children, money issues, reason for the failure of the first marriage etc). In addition, there are those who just can’t really make marriage work (or refuse to do whats necessary) but don’t quite understand that.
Let me give an example of a 2nd marriage that ended in 6 weeks. They get married after a short dating time. She wants friendship cottage cheese, he wants to buy generic. Her kids want to come out to visit and get to know her husband. They only eat Rubashkin, which she wants to buy. He only wants to buy empire because its cheaper. This literally broke apart their marriage. (Granted, its indicative of other issues rather than the chicken or cottage cheese, but those were both major fights).