To suffer requires judgment based upon something being beneficial or deleterious to one’s own being. In spirit we don’t judge and we do understand that an entity has the freewill to choose their path. This path can contain that which you refer to as suffering but it is a part of choice, and choice is a part of freewill which is intrinsic to the nature of consciousness.

A being that’s all knowing doesn’t exist. There isn’t an end to learning even in this vibrational level. An infinite number of possibilities exist even within a three-dimensional construct such as this one. I’m not placing any judgment on the belief in a god concept, but it just seems to be a projection of human desires onto something outside of one’s own self.