I'll start, and, obviously, I'm not an incel, unfortunately.
I dated a doctor once, it was a serious relationship lasting 3 years. I did my best for her, surely, there were mistakes here and there, but if anyone ever tried to do anything to her I would have defended her until death. I know that sounds cringe, but did you ever feel it your duty to do so, especially for a woman you love? In any case, the facade cracked really hard one day. I woke up and I could not stop shaking, it was weird, not like when you have a flu but my muscles were constantly twitching, I could not sleep because my bed was shaking beneath me. I tried to hide it from her mostly, I did tell her and she sounded unconcerned. One night I started vomiting heavily, with the shaking and muscle twitching getting ever worse. I called her, it was middle of the day, I really needed help and her being a doctor. She listened to me, very disinterested, and just said, you know, I've promised my little bro I have to take him out for pancakes today, I can't really let him down. That was it. I felt humiliated and betrayed. She got to me a few days later when I was feeling better and still had that twitch. I swear to God, I saw disgust in her eyes, it was like she was telling me: "I didn't get with you FOR THIS, weakling." I got better, the relationship went on for some months more (since I'm a retard). I'm now convinced women can't feel empathy.