So you think the women, kids, babies, disabled and elderly the IDF have shredded with bombs and artillery should have stopped focusing on their own survival and made it their mission to find captives being held in secret locations somewhere along the toxic debris of a 26 mile strip..? That sounds very plausible.
Alternatively, Israel could have made a deal in the beginning and got all the hostages back alive, but no, Israel thinks it can solve everything with more killing and violence and continues to feign shock when it is met with violence in return. Many of the families of hostages will never forgive Netanyahu for his handling of the crisis