The purpose of the Synod was supposedly the Sacrament of Marriage and families, not homosexual unions, not adulterous unions or any other “irregular unions”.
But the Catholic Church teaching on the former has long been understood. Pope Francis convened both SinNods so Kasper, Marx could poke their noses under the tent.
To put it even plainer: there are plenty of legitimate reasons to criticize Pope Francis, but that is not one of them.