Don't judge any religion or culture based on what you actually see from outside. You mean that living together is a suffering while it's not. I'm living here and it's not depressing at all.

Secondly, IMO it's more depressing and a bigger suffering that two people who once loved each other and pledged a lifelong relationship, suddenly when their lust is over or may be because someone more attractive enters in their life, they get seperated.

Now say what a depressing world that would be? Living together is a suffering then divorcing can't be a boon, my friend!