I think that you should begin to search out other options. Getting your RN would open doors for you, but, there are many RNs that feel the same way that you do, with additional responsibility. Drs still yell at them, their subordinates do not appreciate what they (or you) have gone through, some patients will still be demanding and unreasonable. Take time to speak to the RNs that you are working with as well as others that you know and get their perspective. But, you will have more options to choose from, and maybe you have gone as far as you can mentally, spiritually and physically in the LPN career.
Maybe considering speaking to a college advisor to see if you can gain insight and advice, see what courses a college in your area may offer and go from there. I can understand burn out, believe me. I am a new LPN, but not new to the nursing career. I had been an aide, medical assistant, phlebotomist, etc... so, now, I am an actual nurse with that sort of responsibility of teaching, and being frustrated when I see so many people not taking responsibility for their well-being. I settled in my mind that I will do as much as the patient will allow. If I see that they are really interested, I will hyperextend, but if they are not, then, they definitely will get what they need, but, I can't totally break my neck for each and every stubborn person; it will reduce my energy for those that do, in fact, need. It may sound cold, but that is a reality. It will conserve energy for the bigger things.