Yes, indeed, Exodus 21 is "interesting." Tell us...since Exodus 21 also sets up minimum standards for treatment of slaves, does that then mean you would claim that the Bible advocates slavery? (keep in mind that not all slavery in the Biblical era was American-style slavery...some of it was multi-year economic debt repayment--temporary bond servants).
Moses' Five Books neither encourage/discourage slavery. Exodus 21:7-11, along with Lev. 25:44-46, establish basic treatment standards. Your reference to Ex. 21:10 no more reinforces the practice of polygamy than it would slavery...and the fact that you isolated that verse from a 4-verse context of slavery--and didn't mention that little fact--is a form of half-truth deception if you did that purposely.
“since Exodus 21 also sets up minimum standards for treatment of slaves, does that then mean you would claim that the Bible advocates slavery?”
I’m not suggesting that God advocates slavery, but I would suggest that in several places, the Bible condones the practice. I believe the original poster’s statement was:
“Just because people in the OT were polygamous does not mean God condoned it.”
I believe in the passage I quoted, God DID condone it. I do not believe that God ADVOCATED polygamy anywhere in the Bible. There is a difference.