What the heck is wrong with my succulent?

The leaves look like they're shriveling. I also see some aerial roots. That could either be a sign of not enough water, or too much, leading to the roots dying and the plant dropping leaves out of stress. I would gradually expose it to more light as well as it looks etiolated. So I would put it in a full sized real pot with good drainage so that it has a nice, regular amount of water delivery, and the greater light will ensure it can use that water adequately (and not get root rot)