It is not a secret how I feel about new EMT/new Medic partnerships. As a new Medic I am so busy trying to figure out how to apply all this new information and these new skills to the patient in front of me that doesn't fit any "textbook" description of anything, it becomes extremely difficult to effectively teach a new person their job too. Everyone knows, school only teaches the core knowledge you need to know. It does not teach how to actually work on the street, nor prepare you for everything that comes your way. When things are going from bad, to worse, to Dear God...that is not the time to have both people on a truck trying to figure out their next move....or have one person trying to figure out the next move for both people.
No need to defend yourself, Princess.
You've got two things going on here. One is the quote above. Most likely, that's the core of this whole dilemma. On that level, I don't think the system that you are working in cares to either see or listen to your point of view.
Your point of view is valid: You don't need an anchor that pulls you down, you need a partner whose focus is to be of support to you as the person who has the ultimate responsibility for the patient.
If your system can not respond to these concerns, all that means is you do not fit in it and it's time to find something more appropriate to who you are. I think many people here would agree there are systems that are designed to handle this kind of stuff differently.
The second thing is your partner. If what you describe is accurate, she has an attitude that makes it highly unlikely that you could teach her anything. It may be she just doesn't jibe with you, or it may be that she doesn't want to be taught or it may be, though quite capable in other areas of her life, she's just out of synch with THIS work.
None of that matters. You percieve it as a threat to good patient care.
Maybe here's what you really need to look at, though. Is this situation REALLY impacting your ability to offer professional care or not?
If it is, then you have little choice but to deal with it, and quickly, and also be willing to lose your position if it blows up in your face, which it could.
If it really doesn't, then the attitude needing adjustment is your own because all you're doing is torturing yourself, and maybe her, too.
At this point, I'd say honestly look at this and rate the danger to patient care because of it on a 1-10 scale. And then, whatever the result, take action in proportion to that result.