Hamas has several strategic weaknesses and those one is depravity and savageness of enemy towards civilians, isolation, arab cooperation with zionists and being considered as enemy by them, local collaborators in west bank also does not help their cause either and biggest weakness is constant overall support to occupation entity in limitless quantity, despite all of that they managed to survive 7 months onslaught and still are in overall control of Gaza and exposed enemy as genocidal maniacs like they are.
Hamas like this can go within decades but civilian suffering has to be alleviated and that card enemy uses ruthlessly.