All US administrations have made and do make military mistakes.

We killed 10,000 french civilians in bombing raids in the six weeks before d-day.

War is indeed hell.

We should have brought our CIA teams home after they and the Northern Alliance had toppled the Taliban and ran Al Quada out of its hidey hole. Only one CIA agent had died at that point.

Bush was very wrong. So was Obama for not ending it. So was Trump for not ending it. Biden ended it, probably better than Trump's people could have done.