Not all churches require monogamy, but I will use that as an example. This remains a global problem irrespective of how it affects you: institutionalized monogamy did prevent, or at least limit, the STD epidemic. That's one objective problem off the top of my head, there are other subjective problems.

That's not to say that institutionalized religion didn't have problems, it had many, we simply now have to find other ways to solve the problems that it did.