Why is Thomas Jefferson's view on slavery considered controversial

Well, Thomas Jefferson was the person who wrote "all men are created equal" yet enslaved hundreds of people over his life. He also publically said that White people are superior to Black people. So I think it's safe to say his view on slavery would get him publically crucified today. Granted he did attempt to end any importation of enslaved Africans at one point in his life, under his watch, the act of slavery did not go down, rather went up. He also profited in many ways through slavery.

c. legislation should seek to resolve social problems.