Doesn’t the Devil get a “kick” or almost some type of joy or happiness out of receiving souls of sinners? Simply put, why doesn’t God just do away with the Devil? Wouldn’t he have such power if he is God, of course?
God does indeed have the power to annihilate the devil if He should ever so choose. But…
There is an underlying assumption to your question, and that is that God is punishing satan. Satan, along with (traditionally) a third of the angels rebelled against God because they loved themselves more than they loved God. Thus, they are in hell because of their own desire to be separate from God.
So, satan may derive a type of twisted pleasure from souls entering hell, but that, to God, is a null point.