Is killing slaves for being disobedient a form of wrong slavery?
Is beating slaves so that they can't get up for days a form of wrong slavery?
Is any form of system where people can be born into slavery, never able to leave and find freedom, a wrong form of slavery?
Is forcing male slaves to have to choose between freedom or getting to stay with their family, a form of wrong slavery?
Is deciding you want to bone your female slaves, so you make them your 'wives,' against their will, causing them to be required submit to you sexually, a form of wrong slavery?
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Yahweh/Jehovah didn't care whether or not the slavery was proper. It was horrible under the Jews, it was horrible under the Egyptians. He only cared when it was his chosen people who were slaves. He held a massive double standard for Jews and everyone else.
So he hardened Pharaohs heart so that he may not change his mind, and then started torturing, starving, and killing innocent Egyptians in response to the Pharaoh not changing his mind.
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Everything about that is wrong. EVERYTHING.