"So....Prometheus's situation is bad, and he knew it would be, and he did it anyway, because giving mortals fire was that important to him, and.... I don't think we're supposed to be grateful, exactly, but we're supposed to see it as - vaguely aspirational, maybe? It's about how it was worth it, not about how it was stupid, even though altruism is stupid, generally, it's saying there's an adult kind of altruism. At least that's how I read it. But then there's this entire digression about
'the ruling principle of Hate
Which for its pleasure doth create
The things it may annihilate,
Refus'd thee even the boon to die:
Which ....contradicts itself! If you're conceptualizing of Hate as - the force in the universe that brings people about just to end them - then it seems really important that Prometheus is in fact still alive, that he was not in his martyrdom annihilated, that his defiance is - an ongoing thing, not a thing that happened once and then he died and didn't exist anymore. So - how could death possibly be a boon, which my dictionary says is a good thing? And I don't think it's just a problem with my dictionary because the next bit is 'The wretched gift Eternity Was thine' but that's the only not wretched bit about the whole thing, that he's immortal, that he wasn't annihilated. And then it's got all the stuff at the end about how mortals can - learn from him, take strength from him, aspire to be like him, which makes sense, to conceive of mortals as - at war with more powerful forces that want to deny us everything, but that are less determined than us, and will be surprised, by our determination - and then it ends "making Death a Victory!"
Which is stupid! Prometheus isn't dead! His victory isn't that he died for his ideals, lots of people did that, practically everyone has done that, that is the default outcome if you try having ideals. It feels very important to the story of Prometheus that it is not about Prometheus doing something good and dying about it, and that aspiring to be like him wouldn't be doing something good and dying about it!" And the textbook says that Lord Byron went off to fight in the Greek war for independence and died about it, so maybe he actually was confused and it's not just that the poem is confused, and he thinks the special thing about Prometheus is that he tried to do good and died, but he's wrong, that's not what's interesting about the story at all!"