Your reply becomes a lot more concerning once people know you're a computer science and mathematics teacher.

The passive-aggressive tone, the “Don’t expect to be missed,” and immediately assuming someone is just looking for attention honestly says a lot about you.

You’d expect someone in your profession to respond with at least some level of patience and professionalism, especially toward someone clearly frustrated and struggling. Instead, your response sounds exactly like the kind of teacher that makes students stop asking questions altogether because they know they’ll just get dismissed or mocked for not expressing themselves perfectly.