Sometimes the “reasons” someone gives you as to why they want something a specific way have nothing to do with the actual issue. No matter how you try to meet the need, they’ll keep giving you “reasons,” why your ideas won’t work.
They just want what they want, and nothing you propose will every be what they want.
Don’t feel like you failed to explain something well enough, or that if you’d have done something differently the outcome would have been better. That’s not true.
They were never going to listen to you. They have their “reasons.”