He could change any policies made by Trump. He could (and did) change the timing. He could have actually planned "contingencies". He could have kept Bagram open. He could have had a coherent communication plan to get the 15,000 Americans out earlier.
It seems like he wanted to shit the bed, all by himself. And he did. Worst policy disaster in a long time...totally on ol' Joe.
Shameful failure. And it continues to get worse due to incompetence from "the pros".