Is the Islamic God biased or unbiased?

I have heard a reason as to why this world is like the way it is Islamically and that's because of God's unbiased reasoning hence why this universe isn't all good. (Since making the universe like heaven from the start would be to appealling to human's preferences which would seem biased for a God)

But I feel like this makes sense for a God from the deist view rather than a religious view.

Do you people think that Allah is "biased" as in, making this world through through human's preferences instead of actual reasoning?