Yes, he was appointed dictator before the consulship of varro / paullus, but his strategy proved unpopular. It makes sense: identity is hard and slow to change, and the romans had a strong identity around aggressiveness.
That said, in the defence of romans, they were also open to learning and integrating others ideas into their own. Scipio africanus absolutely learned from hannibal, and was able to layer aggressiveness, deception, and delay into his strategy. Every metaphor is imperfect, and cannae is absolutely an example of being blind / stubborn, but my quibble with the OP would be that romans didn't _really_ change their aggressive identity in the long term, and that identify continued to serve them well for 100's of years after hannibal.
That said, in the defence of romans, they were also open to learning and integrating others ideas into their own. Scipio africanus absolutely learned from hannibal, and was able to layer aggressiveness, deception, and delay into his strategy. Every metaphor is imperfect, and cannae is absolutely an example of being blind / stubborn, but my quibble with the OP would be that romans didn't _really_ change their aggressive identity in the long term, and that identify continued to serve them well for 100's of years after hannibal.