“A large part of his pitch was that Trump was a crass, uncaring individual. ”
That was not part of his pitch. That was the pitch from the other republican candidates.
Biden had a long laundry list of ideas against trump.
“Afghanistan provided a naked contrast between their leadership styles.”
If Trump hadn’t pulled out of Syria in 2019 , you might have a point. But republican’s have conveniently forgotten that Trump pulled out of Syria in 2019.
Everything that you blame Biden for in 2021 , Trump did the exact same thing in 2019. Betrayed and abandoned allies (the Kurds) , allowed the enemy (Turkey and Syria) to regain land that had been lost and created a humanitarian disaster.
After 20 years , it was time for America to get out of Afghanistan. The American trained and supplied Afghanistan military couldn’t win in their fight against the taliban, so the taliban took over. That is not Biden’s fault.