I do have empathy for you. From what I've read, to me it sounds actually like you're trying really hard especially given your emotional/mental state right now. It sucks when people don't understand, can't empathize, and put too high of expectations on you. You know yourself best, not some doctor. If you're trying, you're trying.

L's only expectations of me is to show up, come as I am, be open and honest, and keep trying. We also have the agreements that I don't harm myself, we have at least one closure session, and she doesn't abandon me. With my PCP, our only goal right now is to quit smoking. Diet and exercise and picking we can deal with after I'm able to fully quit nicotine (which won't probably happen until next year). My Pdoc...well her only goal for me is to go back to college. But I just don't pay that much attention to her anyways. My dentist just wants me to brush my teeth. :/ And none of my doctors harp on me about my weight.

You should be able to set your own honest goals. If getting up and taking a shower is your goal for the day, then you succeeded! Taking out one bag of trash, sitting outside for 10mins, making a nutritious meal, going to an appointment, even getting out of bed can be great goals! Especially if you're in a deep depression.

I've had doctors who expect too much or didn't trust my knowledge of myself (ex-T). It sucks! I don't have any advice for you other than to be patient and good to yourself, give yourself credit for all the big and little steps you take, and hang in there.