(16) but ye turned and profaned my name, and caused every man his servant, and every man his handmaid, whom ye had let go free at their pleasure, to return; and ye brought them into subjection, to be unto you for servants and for handmaids.

Jeremiah 34:8-22 ASV 
(22) The word that came unto Jeremiah from Jehovah, after that the king Zedekiah had made a covenant with all the people that were at Jerusalem, to proclaim liberty unto them;  (9)  that every man should let his man-servant, and every man his maid-servant, that is a Hebrew or a Hebrewess, go free; that none should make bondmen of them, to wit, of a Jew his brother.  (10)  And all the princes and all the people obeyed, that had entered into the covenant, that every one should let his man-servant, and every one his maid-servant, go free, that none should make bondmen of them any more; they obeyed, and let them go:  (11)  but afterwards they turned, and caused the servants and the handmaids, whom they had let go free, to return, and brought them into subjection for servants and for handmaids.  (12)  Therefore the word of Jehovah came to Jeremiah from Jehovah, saying,  (13)  Thus saith Jehovah, the God of Israel: I made a covenant with your fathers in the day that I brought them forth out of the land of Egypt, out of the house of bondage, saying,  (14)  At the end of seven years ye shall let go every man his brother that is a Hebrew, that hath been sold unto thee, and hath served thee six years, thou shalt let him go free from thee: but your fathers hearkened not unto me, neither inclined their ear.  (15)  And ye were now turned, and had done that which is right in mine eyes, in proclaiming liberty every man to his neighbor; and ye had made a covenant before me in the house which is called by my name:  (16)  but ye turned and profaned my name, and caused every man his servant, and every man his handmaid, whom ye had let go free at their pleasure, to return; and ye brought them into subjection, to be unto you for servants and for handmaids.  (17)  Therefore thus saith Jehovah: ye have not hearkened unto me, to proclaim liberty, every man to his brother, and every man to his neighbor: behold, I proclaim unto you a liberty, saith Jehovah, to the sword, to the pestilence, and to the famine; and I will make you to be tossed to and fro among all the kingdoms of the earth.  (18)  And I will give the men that have transgressed my covenant, that have not performed the words of the covenant which they made before me, when they cut the calf in twain and passed between the parts thereof;  (19)  the princes of Judah, and the princes of Jerusalem, the eunuchs, and the priests, and all the people of the land, that passed between the parts of the calf;  (20)  I will even give them into the hand of their enemies, and into the hand of them that seek their life; and their dead bodies shall be for food unto the birds of the heavens, and to the beasts of the earth.  (21)  And Zedekiah king of Judah and his princes will I give into the hand of their enemies, and into the hand of them that seek their life, and into the hand of the king of Babylon's army, that are gone away from you.  (22)  Behold, I will command, saith Jehovah, and cause them to return to this city; and they shall fight against it, and take it, and burn it with fire: and I will make the cities of Judah a desolation, without inhabitant.

According to Jeremiah 34:8-22, the Hebrews did not follow the rules of Jesus in Moses concerning their work service.

What men do against the rules, or the commandments of Jesus in Moses does not make Jesus the Author of any despicable acts of oppression by any man. Whether the man is a Hebrew or a Gentile.

What matters is what Jesus says in the records.

Jesus calls for the shedding of the blood of any man who sheds the blood of another man. Jesus calls on the Hebrews or on all men not to oppress any of their neighbors even to give protection to the runaway servant or slave with no string attached. Jesus calls for the death of anyone who steals anyone 'to make merchandise of the person' or to exchange or sell that person at any capacity. Jesus reminds the Hebrews that they know the heart of the oppressed because they were oppressed and, because of that experience, not to oppress anyone.

Now, considering the position of MESSIAH YHWH Jesus (Luke 2:11, John 5:39) in Moses concerning any kind of labor or forced labor, can anyone choose to reject the Gospel of Jesus because of the claims that He promotes and condones slavery?

Any who does take a stance against being obedient to the Gospel because of the false perception of Jesus being an Accomplice of slavery, which is forced or oppressive labor, that person is not really looking to be a servant of Jesus but is just misguided by his enslaving adversary whom he gladly bows down to: Satan.

https://john316love.org/The--Theology-of-John%203_16.html