You do not need everyone to understand a decision they do not have to live with.

People who will not live with the consequences of your decision are not owed a version of it that satisfies them, and the effort of producing that version can go on for years. Understanding is nice when it comes. It is not a requirement for proceeding.

Notice who you are still trying to convince and whether they have any stake in the outcome. If they do not, let the decision stand unexplained. You can be at peace with someone thinking you were wrong.