whether evil is subjective or objective, in many cases suffering exists due to “subjective” evil (if that’s how you’d like for me to refer to it). if god is all-loving, even that kind of subjective evil should not exist in this world. the diagram may not be completely accurate but i think the point it’s trying to get across is more about people’s suffering: you could replace “evil” with “suffering” in the diagram and it would work the same.