User blog comment:Viperys/Konosuba Crack Theory (careful, spoilers)/@comment-28057182-20161111204034/@comment-28057182-20161111204126

And a pretty good counterargument:

Is there even any confirmation she was bad at her job? Sure, she laughed at Kazuma, but the magic sword guy seemed to think she wanted HIM PERSONALLY to fix the world and that she totally was the cute and pure goddess she should have been, so it's not like she was just rude and condescending to everyone. Maybe Kazuma just broke through her facade with his ridiculous death, and she didn't see reasons to lie to him after that. Which did backfire immensely. And the fact she's an idiot doesn't necessarily mean she sucked at her job either. From what we've seen, when she's fulfilling obligation of a goddess, she is actually serious, and during that time she does act altruistic and dignified (as much as Aqua can). And nobody said gods' job has to require a lot of smarts either, kinda like the work of a salesman nowadays arguably requires less smarts than being salesman in the middle ages, despite the fact the salesman nowadays would probably sell more value to his customers in total during the same period of time (if not necessarily earn as much). Which means he would be more valuable to a society overall. Just because you work less and do less complicated things, doesn't necessarily mean your work can't be more valuable than the work somebody is spending more effort on. The higher-ups did seem to kick Aqua out extremely swiftly, but it could just be due to Aqua being incredibly annoying as a person to work with or even to hang out with. Not like somebody firing/moving somebody just because of personal dislike in a big organisation is something that never happens. Or it could be she's a complete dumbass who got the job on just immense divine power, or something. But we don't know that. Not even Axis Cult member.