How the heck did we go from “I see no value in having a conversation with you” to “T...

He berated Kanade for her fake smile and probably assumed that she had a nasty personality to cover up. I wouldn’t be surprised if this is another case of My Happy Marriage where he previously had spoiled or materialistic fiancées in the past. During the wedding he realizes something is up and knows Yuina plays a part in it. So he reconsiders his treatment of Kanade. There’s no reason for him to treat someone so beaten down even worse.