It is a report that was correctly widely criticized. Certainly worth reading, but worth being aware of this.
(I personally think that estimating that the eventual death toll will be 4x higher than the somewhat-verified death toll that exists today, based on guesses of the impact of the war on the population, is very disingenuous and misleading, and mostly a way to just be able to say much higher numbers.)
It wasn't "widely criticized", it's taking into account the starvation, attacks on hospitals... estimating how many people are going to die is important work.
(I personally think that estimating that the eventual death toll will be 4x higher than the somewhat-verified death toll that exists today, based on guesses of the impact of the war on the population, is very disingenuous and misleading, and mostly a way to just be able to say much higher numbers.)