Take a look at my post here:
As I say in there, it’s a lot more complicated than only looking at one aspect, and this requires a great deal of knowledge to navigate.
I’ll tell you this: In my journal, I’ve noticed that all the rituals that appeared to fail were done under inauspicious times. I’m certain you’ll find the same to be true of nearly everyone else’s magick. Because, this is true of every action that can be done. The stars and the condition of the heavens either hinder or aid (and largely completely make or break) any activity.