I did a PhD in CS. There were certainly some students who had a bad experience, but I don't think it was the majority or even near the majority. I think 1 in 5

I did a PhD in CS. There were certainly some students who had a bad experience, but I don't think it was the majority or even near the majority. I think 1 in 5 is a reasonable guess. The ones who did do tend to be more vocal about it, which is natural.