It's funny in a self-deprecating way for sure—and humiliating. It feels like emotional rape, where you can't control your brain but to be unstable. It doesn't matter how many times you try to rationalize with your own brain—you WILL feel the intensity of your emotions, you WILL react, and you WILL crash.
BPD is horrible. It feels like a trauma response, but I've read anecdotes of people being diagnosed with BPD despite never having had any childhood trauma. I think it can also be genetic; some people are simply born more sensitive and easily attached.
I'm going to eliminate this garbage out of my own brain too—a lot of it is anxiety. I can't imagine having BPD if you can't feel anxiety to overrule your prefrontal cortex and whatever else.