Before the war broke off, Gaza is already impoverished by the blockade of Israel. Before the war broke off, the unemployment rate is 46.6%. Before the war broke off, Gaza heavily relied on foreign aid to make it through.

Hamas has plenty of food enough for their fighter, they did not have plenty of food enough for the whole nation.

If you believe Hamas failed their own people, then there's no reason to block or hinder humanitarian aid to help the people, because charity is the failure of the government's responsibility. Israel make it even harder for charity to work.