Agree! I think this is yet another article that is spreading the fallacy that a "one man startup" is bound for failure.
This person (although intelligent) is not being nearly self-reflective enough in realizing his actual faults... e.g. he didn't release early, he didn't test the market, basically, he turned his business into a "science fair project."
I think the root cause of this bad outcome for him is his failure to truly understand his own limitations and finding a way to get leverage to compensate for it (e.g. hiring a salesman). THIS DOES NOT MEAN that just by getting a co-founder, all of this would have been solved! No! It just means that you need to understand the basics of business!