just let me quit

I decided to quit my phd program for two reasons: a. $ b. I'm not sure the program is the best fit for me.

I emailed the director last night, telling her I was quitting, but I only mentioned the money issue. I didn't really want to get into reason B because it involves my ongoing frustration that the profs don't seem to recognize that I have a fair bit of experience in my field, that I know what I want to do, and that I should be treated as a fellow scholar and not as a complete moron.

The director emailed me back, telling me to not "burn any bridges" before she can see if she can work anything out for me.

Now I feel stuck, because I don't really want to stay in the program but I don't really want to explain why and I don't want to be perceived as a quitter. I don't know why that last one bothers me. I guess since one of my frustrations with the program is not feeling like my experience is valued, I don't want to be perceived as someone who just can't hack it.

Ugh. Why can't she just let me quit. I haven't replied because I just don't know what to say. Any suggestions?