Evolution is an effective way to maximise suffering.
It is. It is also an effective way to maximize the smarts of creatures. Without evolution, we don't get dolphins or chimps or you and me.
Evolution is a massively wasteful process. Over 95% of life forms that have ever lived have gone extinct, they got thrown on the scrapheap of failed designs.
It is. But "scrapheap" is a little harsh, I think. They were effective for a time but got obsolete because of counter-responses from the competiton.
A god must have observed suffering on an unimaginable scale for millions of years.
And observing still. Assad has done some really shocking things to the children of the opposition, to pick a curent example. He is not really an innovator in this field.
God's passive role in all of this has to give us pause.
Yes. You are speaking specifically of the horrors inflicted to and by non-human creatures. For these we cannot really simply ascribe evil as a function of free will and so on.
So, evolution is brutal. But doesn't this amount to a complaint that God chose not to short-circuit the process? A sort of wish that the Genesis story were literally true and not a myth? I guess my question back is: is it really true that a good creator could only have created life (and the universe, really) without using a process as brutal as evolution? That the whole process of placing life in every possible place on the planet could only be justly implemented by herbivorous creature who gently pass from this life painlessly and in their sleep?
Maybe it is better to start at a different point. Seeing all this suffering, couldn't one conclude that God is very much like Ares, who actually likes suffering and pain? It seems to me that the answer is yes. I think that an awful lot of societies actually embrace brutality as an expression of justice and the proper order of things (Aztec, for example, or the Huns or somebody). If you go back to Gilgamesh, say, there certainly isn't much of an idea that creation and the creator(s) are good, quite the opposite, I think.