Your own verses you use show that the slave in question could only be a slave for about 7 years and then had a choice to make, do they want to stay or go free. Where else in the ancient world did slaves have these kinds of rights? No where that I know of. So, no, it is not the same as the typical slavery elsewhere, where slaves had no days of rest.
Admit it, it was the beginning of the reformation of a bad system, the very first on record.
It's like God giving Moses their first covenant. It was far from a perfect covenant as they had to sacrifice animals to cover their sin. Then came Christ with a better covenant, as he was the sacrifice for their sins. And even at that, Paul said this about the new covenant in 1 Corinthians 13 which was the love of Christ and his forgiveness of sin.
13 Though I speak with the tongues of men and of angels, and have not charity, I am become as sounding brass, or a tinkling cymbal.
2 And though I have the gift of prophecy, and understand all mysteries, and all knowledge; and though I have all faith, so that I could remove mountains, and have not charity, I am nothing.
3 And though I bestow all my goods to feed the poor, and though I give my body to be burned, and have not charity, it profiteth me nothing.
4 Love suffereth long, and is kind; love envieth not; love vaunteth not itself, is not puffed up,
5 Doth not behave itself unseemly, seeketh not her own, is not easily provoked, thinketh no evil;
6 Rejoiceth not in iniquity, but rejoiceth in the truth;
7 Beareth all things, believeth all things, hopeth all things, endureth all things.
8 Love never faileth: but whether there be prophecies, they shall fail; whether there be tongues, they shall cease; whether there be knowledge, it shall vanish away.
9 For we know in part, and we prophesy in part.
10 But when that which is perfect is come, then that which is in part shall be done away.
11 When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things.
12 For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known.
13 And now abideth faith, hope, love, these three; but the greatest of these is love.
God reveals himself little by little. Baby steps, but at the end of the day, Paul still felt in the dark about a great number of things as do I.
As for how slavery was covered in the NT, you are talking about slavery under Roman rule, which is a whole different ball game.
I suppose you feel that Paul should have told them all to take up arms and murder their slave owners instead. Yea, I'm sure that would have gone well. LOL.
I am almost reminded of how Paul felt before going to his death for his faith as he was held in the deepest and darkest of dungeons. He still had hope and peace, something the world could not strip from him no matter how badly they mistreated him. Even though he was physically a slave, God had set his soul free long before.
