The reason the destruction in Gaza looks as bad as it does is because of the way Hamas organized their military operations.
Engineering a situation that would guarantee as much destruction and carnage as possible, so that Israel would take the blame for it, was the whole idea.
The fact is that Gaza is not what you see when they start a war and lose.
Gaza is what you see when they turn the majority of their civilian infrastructure into dual-purpose military installations (as a war crime and staging area for war crimes) and dig about 400 miles of terror tunnels with 5700+ shafts opening into all manner of neighborhoods and structures and then start a war from that platform and lose.