Not really surprising to me. Neither side had really backed down from their conflicting demands, at least publicly (albeit keeping track of what trumps public position is, is basically impossible). Maybe something different was being said privately, but it really seemed unlikely a deal would be reached.

Not to mention the constraints US is under from its partners. Even if US wants to wrap things up and is willing to give Iran whatever it wants to get that, i can't imagine that gulf countries would be thrilled by iran essentially taxing their oil exports, and Israel seems pretty intent on finishing off Hezbollah. USA might have significant influence among its partners, but they aren't its puppets and are unlikely to go along with plans significantly against their own interests just because america said so.