Lets stop with the “demographics” b/s
Romney ran a Johnny One Note Campaign. Used a poison dart blow gun when he should have used a cannon loaded with grape shot because he had pleanty of stuff he could fill that cannon barrel with..
They failed to hammer away on what will happen when Obama gets returned; The Obama 2013/14 Tax Increases. The impact of Obamas energy policies..(a socialist construct never branded as such) and a bread and butter issue which reaches into every demographics pocketbook...The impact of Supreme Court(snip)
How could the architect of Romneycare argue against his own creation? This campaign was doomed from the start, for this very reason.
The talk show hosts agree with your assessment:
Dennis Prager critiqued Romney as not knowing how to address the left rhetorically
Michael Medved said that because Obama ran 86% negative ads vs. Romney, it helped to suppress the Romney vote. (And that was 86% of ads directed by Obama campaign; doesn't count the SuperPac ads)
Of course, some of Romney's ads about Obama were negative, but not enough.