Newt was actually very popular at Hogwarts, he just wasn’t aware of it. Mainly because Theseus did everything in his power to preserve his little brother's virtue from all their perverted classmates and teachers.

Tina, Queenie, and Graves get a letter from Theseus, since Newt will be staying for awhile. They become quite confused when the only thing written on the letter says is….”Good Luck."