The question was, how can it get worse from a Gaza resident's perspective.Yes Trump negotiated the end of the Afgan war, but Biden is getting the blame after extending the deadline and no one had any clue that the Afgan army would not defend against the Taleban. Biden and Trump get credit for ending the longest war but it was Biden that took the action. No, it is war and we had to leave some good helpers etc behind. It was a mess. Usually ending a war is far harder than starting a war.
How can it get worse? Easy, the Iran backed organizations founded on the principal of wiping out Israel.
And if the Pentagon "didn't know", then that would be a massive failure on their part, from an intelligence perspective, being too naive, and not properly preparing.
The fact is the Pentagon tried to drag their feet hoping to not have to leave. And then rushed it. It was all on them. The Military Industrial Complex tried to control things.