Whomever was the Pharaoh God had Moses take down, we can safely bet he was a very glorious king. With a very mighty kingdom.
This might had as its fuel the hebrew slaves, and Moses was a hebrew. God used Moses to take Pharaoh down.
God did not make bones with Moses but told him, “I rose up Pharaoh just for this purpose, to take him down, so my glory may be seen.”
This was the only way for everyone to see God’s glory, and without seeing God,’s glory, how can you see God to worship him?