I am agnostic, because I refuse to believe that some creator would stand by and do nothing while so many sentient beings suffer on Earth.
I also refuse to believe in a diety that would create a world where sentient beings must prey upon other sentient beings to survive.
I don't "refuse" to believe anything, however unpleasant or not to my liking, if it's evidenced and substantiated. Fortunately ... supernatural beings and realms are neither. They're not even ABLE to be evidenced or substantiated, as they are non-falsifiable.
If I were obliged to believe in the Abrahamic deity, I would still not be able to worship such a cruel, sadistic being.