Israel are doing none of those things.
Gaza has adequate fuel, it's being hoarded by Hamas for military purposes. They have medicine and water, once again it is being channeled to Hamas fighters and away from civilians.
Israel gave over 2 weeks notice for civilians to move into safer areas with more access to medicine and aid prior to their attack (a tactic that places their own troops at far greater risk, purely to try and prevent civilian deaths)
Have you any idea how hard and complex a military operation removing a terrorist group from a densely populated civilian area is? Israel are doing a good job of minimising casualties tbh. Where did you learn about military ops? The Ladybird Book of Tactics?!
Hamas have a lot to answer for in regards to things like placing their command posts in hospitals deliberately, keeping supplies from civilians in order to resupply their fighters and refusing to let civilians leave to safe areas.
I also must have missed your condemnation of Egypt, who also have closed border with Gaza and are refusing to supply them with food and water?