You just defined a lot of people as idiots. I thought this was about a certain phenomina you want to stamp out, not attacking Hannah, Sarah, Rachel, or any of the rest of the godly people who gave women more children through sharing marriage for the Promise of Abraham.
Ive also showed your "promise to abraham" is NOT what happened with Ishmael, that was a promise to Hagar.
To the rest:
Sarah suffered so much from her decision to get her husband to sleep with her handmaid, that she later had her husband toss out the woman and her child.
God showed His love and mercy to Hagar.
Rachels situation was not a result of chosen polygamy, nor Gods will, Leah her sister, suffered greatly as a result and because of her suffering God blessed her, Rachel was not blessed because of the situation, she is shown to be very jealous.
Her husband didn't invite other wives, he was tricked by their father who made a lying promise.
thanks for another example that shows heartache and suffering in a multiple wife situation, you could read about solomon also and the many wives and suffering situation where God even warned about multiplying wives to oneself.
Hannahs story also shows heartbreak because she at first couldnt bear children and her husband favored another wife for children.
All your examples show anguish lies and heartache. You ideally should be coming away with how many problems it (polygamy) creates.
Lastly if it were Gods will for marriage, a bishop should be the husband of many wives, not one expressly stated - being he is Gods representative, and Christ Himself wouldnt point back to creation itself and intent of a man and woman being one, not many.
