Nobody should treat a household member or child the way the bible describes slaves should be kept, whether they use the actual word slave in the original translation they are describing how to own people you can beat as long as they don’t die within a couple days. They are talking about the allowed treatment for when you keep non-hebrew slaves, you don’t have to excuse it saying they were treated well because this is describing how they should be and were treated.

Edit: Of course I’m looking through it with a lens of modern ethics, but one of the selling points of religion is a dogma that never has to change because they know absolute morality from prophetic futures and can tell what is going to happen except apparently when it doesn’t