Makima is literally the villain of the story, tho. She is never portrayed as anything else, even Denji's obsession with her is shown as pathetic, sad and the result of him being fucked up.

I don't think pacts with demons are shown to be cool. A bunch of the people got fucked through them. When were demons cool in it? I mean... Pochita is cute, but even that mutually beneficial partnership is making Denji's life both much better and infinitely more dangerous and also very traumatic.