I also took the term "disgruntled" and dissected it with Occam's Razor. Back when I was teaching at a public university (and happy with it), I called myself a "gruntled government employee".
This reminds me of a famous PG Wodehouse quote, something like: "While not precisely disgruntled, he was far from gruntled."
I like defenestrate "to throw from a window" and from HP Lovecraft: squamous, Stygian, ichor, foetid, Tartarean. The problem with using those in a story, though, is that it usually comes off as Lovecraftian pastiche.