Lots of reasons but mainly that the high civilian death toll is easily explained by Hamas's strategy of using human shields and Hamas's criminal leadership decisions.
The most shocking and inflammatory "reports" are usually unverified and usually come from incredible or incompetent sources, and that this is readily apparent in virtually every article about the war if you can slow your emotions down and actually evaluate the reported facts. Article from credible journalists usually even say "these reports could not be independently verified."
I also find the IDF to be generally credible, usually victims of lies and exaggeration, whereas I find Hamas to have zero credibility whatsoever. I also think it's completely justified to continue bombing military targets until every member of Hamas is dead, and that if civilians in the area of a military target have been reasonably warned to evacuate, that's all that morality or international law requires before launching a strike, especially in light of Hamas's strategy of hiding among willing civilians while also failing to wear uniforms.
Also the death tolls are going down month over month, and the fact that only 30,000 people are dead in in such a densely populated area of 2.3m people, is a testament to the fact that the warnings mostly work, that the evacuations mostly worked, and that the targeting is mostly very precise. Otherwise, the death toll would be much higher.
I also view the conflict almost entirely in terms of the posture between Israel and Iran and trying to avoid a broader war that could kill 100,000,000 people, perhaps more. Like what are we talking about here? Human life, human rights? Try on 30,000,000 dead and see how sad that makes everyone.
Also, I don't see how giving Hamas a country advances the cause of human rights? Extreme religious autocracies have never once secured human rights for anyone. In fact if you go to Gaza and start talking about securing human rights for people you might get murdered for being an infidel.
Finally, the handful of legit war crimes committed by Israelis don't color the entire war for me. Israel actually has a history of prosecuting war criminals, unlike in Gaza where war criminals get a prize from Daddy Hamas.