Debating my Muslim Friend pt.2

So me and my friend were debating again today and he says he “puts holes in my arguments” but he doesn’t. Specifically, we were talking about the trinity, and he believes God can’t walk amongst his creation and humble himself, and says that how can something infinite limit themself. I then asked him, “What is a God who is said to be omnipotent, but can’t everything and anything he wants?” And we just kept circling back to topics like why Moses was sent before Jesus and he said “why would God send a prophet before he sent himself” and I will tell him “Because of timing” and he says that isn’t a valid argument, when that is literally the best short answer to give in that debate. He will also continue to say how the Bible Has been corrupt but Translations of the Bible doesn’t mean corruption. It was just funny seeing him circle back to topics and not like my answers on his questions and rule them as incorrect. Finally it concluded with him saying “i am a slave to Allah” and I gave him a side eye and told him that doesn’t sound like a religion I want to follow when im referred to as a a slave. As a Christian, God knows me as a child of him and his servant, and my friend tried to say I was prideful since I look at myself as a servant of God and not a slave, which was hilarious to me.