How very sad.
I would like to think that I'm as close to my high school students as any of my own children's elementary school teachers are to them.
I'm not sure that a 16 year old needs 5 hours together, 5 days a week, to click with a teacher.
My dd15 likes one teacher this year. None last year, one the year before. Teens are hard - many don't like most adults. She is an honor student, and takes all honors classes, and gets A's. She's just in the middle of teen angst, and can barely get a hello out to me (although she's always happy and bubbly around her friends). On the other hand, my elementary school kids come home and tell me how great their teachers are, how much fun they are. It's just a different dynamic.
I liked a handful of teachers in HS, but I really remember my elementary school teachers! I still run into them, and we talk about old times. My older kids have had JH/HS teachers that I've had, but I don't think they've made the connection.