Hi Brian and WELCOME to BPDR!!
I don't know much about ROBT, but from what I've read it's a subset of CBT and I'm a HUGE proponant of that. I hear what you are saying about how your problems are caused by something in your past....... but I feel that's just it. Those problems are in the past-- it's how you handle your emotions and thoughts in the NOW that can allow you to move forward with a happy, healthy life. My core issues were also a result of my past, but by learning that those issues were not indeed happening in the Now, I was able to move forward.
As for your LPC understanding the severity of your issues.....well, the only way they can, no matter the training they have undergone, is for you to impeccably state them to him/her. By being honest with yourself and your T in your sessions, I believe the severity of your issues will come across. For me it's not about the 'severity of my illness' in terms of 'what a person with BPD should be like' but rather a very individual assessment of MY issues. Though my diagnosis is MDD and BPD with a little GAD thrown in, it wasn't until I began being honest with my T about the particulars of my personal issues that he was able to help me. In other words, I don't think it's so important for a T to understand BPD or any other label, but rather I think it's important that they understand my own struggles.
We do have many males on this site, but probably more females. For me, I learn equally from both and I hope that you will be able to as well. There is a tool section on the upper left of the screen (if it's working; we are having site troubles atm!) that has been very valuable to my own recovery process. These tools have helped me learn to speak and act with integrity and have shown me where my thinking was perhaps a bit twisted and allowed me tools to untwist. I strongly recommend them!
Well, I just wanted to welcome you to this site. I hope you find what you are looking for here and are able to find your way towards that happy, healthy life we are all seeking. I look forward to hearing from you again!