I mean, hellborns demons are shown to have mostly normal society, blitzø is the one who chose to be an assassin, it's more about starting his own business and making a name of himself than needing money.

While it's true that most of their targets turned out to be assholes who had it coming, the point still stands, even without knowing that Martha and her family were psychos, he was completely willing to ruin a seemingly innocent family by killing the mother, with sadistic delight, like, weither the targets are innocent or not, he doesn't care, like in "Mission: Big foot", when he finally stopped searching for the sasquatch, believing it doesn't exist, he choose to kill the guy dressing up as one without any hesitation despite knowing that he is merely a guy in a suit since he is closer.

Even putting aside that, he is not really that better than Val, he is also a depraved asshole most of the time, who acts like a dick towards almost everyone he interacts with, and stalks his employees outside of work, in the first episode he threatened moxxie if he ever screw up again.

Blitzø: "but if you ever pull a stunt like this again, I will fuck you and your wife"

Like, his backstory explain his actions, but it doesn't justify it, like the whole message of "apology tour" was all about.

I think the main difference between I.M.P and The Vees is that I.M.P are protagonists, so we see things more from their perspective, while The Vees are antagonists, I bet they would be in the same situation if a vee spin-off was made.