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That's basically true of any fuel on the petroleum spectrum.

Here's an MSDS for what you pump into your car as fuel: https://www.vercounty.org/MSDS/EMA/9950allgradesgasoline.pdf. Note how it's basically saying the same thing?

So you shouldn't drink it, breathe it, or swim in it? I don't know if I'd call that "hellacious" in the "things I won't work with" sense.

For "things I won't work with" it needs atleast "flammable upon contact with skin/oxygen" or "friction explosive, no lower bound" or even "highly toxic and highly carcinogenic".

"so rapidly hypergolic that no ignition delay has ever been measured"

Sounds like kerosene.