Cars aren't a contagious disease that grows exponentially.
You might think there's a big difference between 20,000 deaths and 200,000 deaths, but with exponential phenomenon you have to take logarithms, it's the difference between 4.3 and 5.3; the models were only off by 20%.
If the international response hadn't been what it was, it could have been 6 or 7, tens of millions of deaths.
Really, this whole post is the most dangerously stupid thing I've ever read. The modelling didn't fail, and even if you live in the West, if you weren't scared rigid by the Ebola outbreak, you didn't understand what just happened, and if you think the modelling failed, you don't understand what modelling can, and does do.
The Ebola outbreak wasn't just a single disease, Viruses evolve very quickly, and some previous versions of Ebola seem to have been infectious by inhalation. If Ebola had evolved to better do that, it could have been a worldwide pandemic with a 50% death rate.