There are very few villains worth mentioning who view themselves as such. There are really three types; those with a warped internal monologue that justifies their actions as being in the service of some more deserving cause (even if that cause is as simple as 'because I deserve it"), those whose inner monologue is insufficient to war with their darker angels, or those with no internal monologue at all. The exceptions to these paradigms are vanishingly rare. The only really famous one I can think of off the top of my head is, arguably, DC's Joker, or characters with similar genesis like Carcer from Pratchett's "Night Watch."
You've assuaged a lot of my concerns just by responding. I'm not only willing but actually quite eager to follow you down this ethical rabbit hole now that I have some level of confirmation that, for good or ill, those morals and ethics are being examined and that this is not simply an apologist text for the kinds of behaviors and attitudes your protagonist exhibits. This is the internet, after all, and we both know there are no shortage of people on these tubes that would write Jason's story and actually consider him a blameless protagonist, even a kind of strange Byronic Hero. The simple acknowledgement that it's not that simple is all I need to feel like I'm not wasting my time here. Please continue writing, and I'll continue reading.