User blog comment:Malthael Archangel of Death/God's behaviour/@comment-4554525-20190814050243/@comment-34461065-20190819211902

I think the original creator of the show didn't want to literally use God and angels and such, for a variety of reasons, mainly he edidn't know ho to use them, but it was through fan demand and excutive pressure that they ended up adding angels and such.

I do not think the writers had the idea of making Chuck evil from the start, I think they just wanted him to be a mysterious God. It was by season 11 that they retcon it and wanted to give him more human characteristisc, make him much more flawed, less glorified. but still not evil. The idea of him being evuil is probably something they though up half way into this season.