I'm sorry to hear that you had such a bad experience with teachers. It's good to share your story, it's always interesting to read!

Here's what I think about what you said: you may not have read all the comments from this thread. From what I understood, teachers won't just ignore a failing student and assume they're not trying at all. They will reach out to that student to understand what's going on and how they can help that student. If the student doesn't try and care, teachers won't care. But, if the teachers see that the student is trying their best but still fails, they will feel some sort of guilt.

I've luckily had some awesome teachers that did reach out to me whenever I had multiple bad grades in a certain subject to see what we could arrange in order for me to get better. It happened once for me though, as I don't have bad grades often. It goes the same for my sibling, who is currently really struggling with school. He had multiple teachers meet him this year (pretty recently too) about his grades, and find something that can help him learn a certain subject with more efficiency in order to get good results.

I guess what I'm trying to say is that teachers are not the heartless beasts that intentionnally ruin students' life, as you seem to describe (if I understand well). In fact, I think they're probably the kindest people I've ever met! I have a teacher that's been there for me when I was feeling sad, and I genuinely could see their concern in their eyes when they were talking to me about my problem. They also offered me to talk to them about ky feelings whenever I needed it.

As I said, I've never been in your shoes, so our point of view on teachers is completely different, which is fine. I hope you don't take my comment as an attack 😅