<human>: Can you condense the text into three sentences or less?

I've recently became a supervisor at a place I used to intern (unpaid). My supervisor now would coordinate the interns (this included me), but when I graduated college I was offered a terminal position for the job. I really enjoy the work we do and it is directly related to my field of study.

However, since I've assumed this position, my supervisor (who used to do the work I'm now doing) is consistently correcting me or overriding my decisions in front of the interns, which has now developed into a problem with one of my interns not respecting me. Despite sitting the intern down for a talk, she essentially told me that she didn't need to respect me because I'm not the one who hired her on as an intern. My supervisor printed the intern an informational packet, which included every employees contact information, except for mine, and handed it to the intern. Needless to say, I am feeling undermined and disrespected and am wondering why they even created this position when it's obvious it's not what they really want. Between the incredibly disrespectful intern, and my supervisor's controlling ways, I'm just asking myself what's the point. I don't get paid enough for this, and honestly the job was dumped in my lap. I didn't even interview for it.
<bot>: Was intern, now supervisor, prior supervisor can't let go and undermines my authority in front of interns, now have interns who don't respect me. Really like the work, the stress is killing me. Why should I stick around?