What fiasco? It was obvious from the start that their schedule was wildly optimistic. But that's probably just Elons way of pushing workers as hard as possible.
It's way too early to call the Model 3 a success or failure. Of course it takes a few months to ramp up and stabilize production. It's their first truly mass produced car, and there's a lot of differences from their previous model. Not to mention that they're using a brand new battery.
Let's wait a year to call the Model 3.