Is a person considered sinful Islamically if he divorces his fiancée after discovering matters that were not apparent to him during the Sharia-compliant viewing?

Divorce is permissible even if there is no need for it, but it is disliked without a reason. You are not wronging your wife if you divorce her due to her short stature, but it is better to keep her if she is righteous. It is advisable for anyone contemplating marriage to inquire about a woman's qualities before seeing her, in order to avoid the embarrassment of divorcing her later.