Seems that some conservatives are content to armchair quarterback what Romney did and did not do.
Didn't attack enough? The same people would be kvetching today if he'd gone on the attack (on a member of a very protected class) and blame that for the loss.
Sorry, but we need only look to the electorate for the answer. (Some personal responsibility)
Some of you are the reason he lost hispanics. You booed when Rick Perry said we ought to have a heart on immigration, and forced Romney to his right.
You screeched amnesty and killed an immigration bill that could have have a republican stamp on it.
Some of you were too "pure"to vote for him, so you stayed home or voted for gary (obama).