Greek mythology is taught in middle school, at least it was in my day, which was admittedly a while ago.
I think that Greek mythology is pretty easy to understand. Each god [in the abc version] is in charge of one thing, so it's pretty much putting round peg in round hole, educationally wise. Once you get deeper into Greek mythology, lines start to blur and you find out that Aphrodite wasn't really the goddess of love, at least not exclusively.
Most other mythologies are so much more complicated, it's hard to boil them down to a 12-year-old's power of memory/learning pace. But that's the fun part of being grown-up.
I believe that a 'twilight of the Gods' would occur in Greek Mythology as well. Asklepios god of doctors was killed by Zeus, so the Immortals can kill lesser Immortals.
Why would a Twilight of the Gods occur in Greek Mythology!? Well, Cronus and his Titans were left inside the earth to engineer socioeconomic crises upon human civilization, causing them to forsake Zeus and his Pantheon, they left humans to endure the cold Iron Age that ensued. Zeus' obliviousness to this fact, culminated with Cronus' wanton destruction of Zeus' precious humanity would result in Gaia being scorched by industry. She'd probably turn to the Alpha Greek God, the OG, the one who was once the most aggressive of them all, and the most powerful as he was the first masculine Greek Deity and Gaia's equal. She would turn to her one and only Uranus, heal him (she created him) so that he has the balls (literally) to throw his weight around, and start anew, with better offspring this time he'd take a host of new Immortals and slaughter close to a thousand Gods and Titans up from Olympus and down to Tartarus before taking down the human industrial infrastructure that has poisoned Gaia. Just like humanity starts anew after Ragnarok. Very similar.