I have a feeling it wasn't fully ripe. Out here about 1 in 10 Mangoes are actually decently ripe, about 1 in 4 Papayas are decently ripe. And of course, 1 in 20 Pineapples are decently ripe. Should be fully golden, not green.
On the Durian. I honestly don't know anyone who knows Durians and...