Let us leave aside, for the moment, the question of benevolence, and whether it is a quality of whatever creator god may exist. We can focus on just two of this purported god’s qualities, omnipotence and omniscience. If he, she, or it* created the universe, and has all power that can be had and knows everything that can be known, then we run into a problem, the creation paradox.
If God were a conscious being who decided to create the universe, then prior to deciding that, he must have been in the condition of not knowing whether he was going to create it or not. If he always knew he was going to create the universe and when he was going to do so, then he did not decide to do it. Either there was a time when he didn’t know what his decision was going to be, which would mean he isn’t all-knowing, or the decision was built into his nature from the beginning, in which case it wasn’t God’s decision.
So it was impossible for God to decide to create the universe. By the same reasoning, he could not have decided to do anything. If God always knew everything, then there was never a time before he made any particular decision. All God’s decisions had to be part of his nature from eternity. Where does that leave free will? Clearly God doesn’t have it. God cannot will to do anything different from what his nature had always required.
Of course, if you don’t believe that God is all-knowing, that removes the difficulty, but then we are talking about a different kind of god. I am perfectly willing to discuss the possibility of a god who is not all-knowing or all-powerful, or even a god who is not benevolent. Those kinds of gods would at least be logically conceivable. In the future I may address the possibility that such gods could exist.