I think a traumatic experience can certainly lead to improvements with dating, because it gives you a reality check where you realize that women can be just as terrible as anyone else - and that takes them off of whatever pedestal you might've had them on.
Story time...
My first serious girlfriend was one I met during my senior year of college while she was still a sophomore, I think (maybe a junior). When the summer came around, I invited her to visit me for a few days during my annual beach vacation with my family. We had a great time, and when I brought her back to Delaware so she could get a ride back to New York (where she's from), we mutually agreed that despite the distance, we would try to make this work.
For a few months, things were good. I visited her a few times, and they were always good experiences.
Then summer ended, and she resumed school in New York, rather than in Delaware, where I met her. She made new friends, including a guy who would try to make moves on her despite knowing she was dating me. She told me he would try to dance with her, and she would always push him away. I asked if I needed to intervene, and she told me she would handle it.
One night, she stopped texting me way earlier than usual, telling me she was drunk. Didn't hear from her the rest of the night. In the morning, she called me sobbing, telling me she had cheated on me and that she was so sorry. I didn't know how to process that, so I hung up shortly after. I called her back later, and she was now mad at me because now she was telling me she was r**ed, but blamed herself, and was upset at me not being able to see that. She hated that I'm at such a distance that I couldn't be there for her, and thought it best we break up.
She'd had some previous trauma that she blamed herself for, so I was inclined to believe her. I tried calling her back and pleading with her to let me drive up and be with her to help her through this, but she didn't want to talk to me or see me, having already blocked me on all social media.
We said our goodbyes, and that was it. For the next month or 2, I was very depressed because I was now blaming myself for something terrible that happened to somebody I loved, because I was long distance and couldn't be there for her or prevent it from happening.
Then I learned the truth...
See, she had blocked me on all social media, as well as my phone number, but I had a female friend who followed her when we started dating, and she was telling me what she was posting. Bikini photos, workout videos in tight gym clothes - not exactly what a recent r**e victim would be posting. Then she posted a picture with a guy, I asked if he was tagged. Turns out, it was the guy she told me she would "handle".
Depression turned to rage. I wrote a very long and detailed letter to her parents about the sh** their daughter's been doing that they didn't know about (beyond what she did to me) and planned to mail it to them. I also meticulously planned how I might make a surprise appearance and ruin the guy's day, in such detail to avoid leaving any trace I was there. I ended up doing neither of those things.
One night in March several years ago, at like 3 AM, she texts me from a new number, confessing the truth. She was probably expecting me to be asleep at that hour. Instead, I told her my friend had been a follower of hers the whole time and had told me everything. I cursed her out, blocked her number, and never thought of her again.
From this experience, I lost my ability to fully trust most people. I'll trust close friends and lovers to some extent, but no longer fully, with everything. I think this made me much better with women, in certain ways, because I was no longer looking at them through rose-tinted lenses, and experienced firsthand the kind of mental manipulation they're capable of.
What you experienced wasn't a dramatic event or trauma...you just wimped out on shooting your shot with 1 girl...