Fire like fear, like panic, like one more minute of this and I'll die if he doesn't knock at my door, but I'd sooner he never knock than knock now. ("Call Me by Your Name")
I am aware of the idiom "I'd sooner do sth" that means "used for saying what you would prefer to do." I understand the syntactic structure of it where the main verb is "do," the adverb is "sooner," and the auxiliary verb is "would."
However, in this case, the syntactic construction I interpret is "[subject]+[auxiliary verb]+[adverb]+[ANOTHER SUBJECT] +[adverb]+[verb]," where I feel like a verb and a conjunction are missing.