Yeah, that's exactly right, except also while what he is doing to mankind is bad, but it is also for the sake of the universe. So you can't exactly say if he is bad or good.

He's just amoral.

With Kyubey, he doesn't know what he is doing. Like he doesn't understand that it's a bad thing, he wouldn't even know if something was good. So really, you can't blame him. Not his fault he doesn't understand emotions.

Kyubey is incapable of comprehending human emotions; therefore, he would not understand that and why he is hurting the girls he makes contracts with. Kyubey is really just doing his job, which is for a cause of survival and environmental adjustments. The Incubators have intentions to benefit their society, and in order to do so, they benefited our society, as well. In the end, it doesn't work out too well for humanity (Madoka's transformation into the doom-inducing and virtually invincible witch that was fated to show humanity its end, for example), but, overall, Kyubey really was just doing a job.

He is an asshole like Gendo Ikari.