You mean to say that spirits are uniformly good and show none of the ethical variety they did as humans? Hijinks, mistakes and even crime can't all be evil spirits.
Anyway, it sounds like this god must be doing a lot of work handling such a vast array of characters and coordinating it all. It must be a tiring job. Is the end result worth the whole gruelling enterprise?
Why doesn't this god start at the end, with the perfect creatures it always wanted as company?
The potential to do work that streams from above and assured the denizens of the various levels that there must be a god at the helm sounds like faith. Is this faith enough, to you, or do you count your experiences with spirits as more important towards your beliefs?
If your experiences are important, and they are your evidence, then why do you not seek more evidence about this god? Just because you are convinced there are spirits does not mean that there is a god. They could be tricking you, or something like it.