I'm tired so I'm going to copy+paste a bunch of shit from the internet without citations.

1: Is God willing to prevent evil, but not able? Then he is not omnipotent.
Is he able, but not willing? Then he is malevolent.
Is he both able and willing? Then whence cometh evil?
Is he neither able nor willing? Then why call him God?

2: Let us suppose that this perfect God did create the universe. Humans were the crown of his creation, since they were created in God's image and have the ability to make decisions. However, these humans spoiled the original perfection by choosing to disobey God.
What!? If something is perfect, nothing imperfect can come from it. Someone once said that bad fruit cannot come from a good tree, and yet this "perfect" God created a "perfect" universe which was rendered imperfect by the "perfect" humans. The ultimate source of imperfection is God. What is perfect cannot become imperfect, so humans must have been created imperfect. What is perfect cannot create anything imperfect, so God must be imperfect to have created these imperfect humans. A perfect God who creates imperfect humans is impossible.

3: God is omniscient. When he created the universe, he saw the sufferings which humans would endure as a result of the sin of those original humans. He heard the screams of the damned. Surely he would have known that it would have been better for those humans to never have been born (in fact, the Bible says this very thing), and surely this all-compassionate deity would have foregone the creation of a universe destined to imperfection in which many of the humans were doomed to eternal suffering. A perfectly compassionate being who creates beings which he knows are doomed to suffer is impossible.

4: A God who knows everything cannot have emotions. The Bible says that God experiences all of the emotions of humans, including anger, sadness, and happiness. We humans experience emotions as a result of new knowledge. A man who had formerly been ignorant of his wife's infidelity will experience the emotions of anger and sadness only after he has learned what had previously been hidden. In contrast, the omniscient God is ignorant of nothing. Nothing is hidden from him, nothing new may be revealed to him, so there is no gained knowledge to which he may emotively react.
We humans experience anger and frustration when something is wrong which we cannot fix. The perfect, omnipotent God, however, can fix anything. Humans experience longing for things we lack. The perfect God lacks nothing. An omniscient, omnipotent, and perfect God who experiences emotion is impossible.