Health – not everyone gets divorce because they think it will be better next time. I think that’s a bad reason to get divorced. I think that someone should only get divorced if he/she thinks he/she will be better off not being married to anyone than being married to their current spouse.
I agree with JF2 that if someone is in a dead marriage, they should get divorced. On the other hand, if there are kids involved, they should think very carefully about all the consequences of getting divorced vs. the consequences of staying in the dead marriage.
I’m not saying that getting divorced is wrong when there are kids (in some cases, it may even be better for the kids), but just that they have to really think it through carefully. If they do decide to get divorced, they have to think carefully about the effects on their kids and how they can mitigate them. For example, it is important to make sure that boys have someone to learn with them and sit with them in shul. It is also important to make sure that none of the kids feel over-burdened and that the kids have a good support system.