Krof_Gninut:I feel like I am dying. I suspect I am in a depression, which I suspect is being caused by me digging up old wounds before I had the power to do something about them
It seems like you have two things coming up that will allow you more independence, a degree and a job, and this is causing you some difficulty. How were you treated when you tried to gain adult-like independence (or the skills for it) to varying degrees at different ages, especially independence from her desires for your life? How have your parents tried to get their way in the past?
Krof_Gninut:if my mother will allow it; she is trying to be subtle, but I can see what she really means
She seems to have quite a hold over you.
Krof_Gninut:So the emotions I dug up are going stagnant.
That may be because you are trying to protect yourself somehow.
Krof_Gninut:This has left me with a complete inability to even begin to do my schoolwork; even trying gives me intense anxiety, and I am skipping sleep some nights because I feel like I don't deserve to sleep with such a piling workload (my mother is also apathetic to me having a reasonably healthy sleep schedule).
She sounds controlling and slavedriving to the point of not caring about your needs rather than merely apathetic.
Krof_Gninut:She emphisizes the money such jobs earn as if that is all that matters; I think she is just trying to set up one son to be wealthy and emotionally crippled to take care of her when she is old
You may be right, but it seems like you're taking care of her current desires to run a life that's successful in her, or more likely her peers' or parents', eyes (probably completely unlike hers, since she likely has no motivation to go for what she wants). The thing about old age is likely a distraction from that.
Krof_Gninut:I swear, given that she is refusing to see any signal at all that something is not right, it's like she wouldn't care if there was a risk of me hanging myself in my future office as long as she got her old age resources
People who try to run others' lives do not have empathy for them. This is quite clear by her disregard of your depression and your suicidal thoughts.
Krof_Gninut:the end is within sight, but at the moment I'm completely helpless to to get it
You don't have to get it now. There are ways of stopping now and picking up later. Just make sure you talk to the people at your school to see how to go about that successfully rather than just quitting suddenly, since that makes it harder to resume later.
Krof_Gninut:My increasing understand that this path was (yet another) machination of my parents has proportionally deadened my intrinsic motivation to keep going.
Right. Slaves don't have motivation, especially when they have another way to survive, like the Underground Railroad of your upcoming job. The light at the end of that tunnel (or the similar tunnels it hints at) is likely why you quit doing what she wants.
Krof_Gninut:But this really is quite painful, spending even another second in this house. Does anyone have any suggestions on that might be helpful?
It sounds like your mother is quite proficient in inflicting pain. I would recommend taking this time to become more conscious of that rather than trying to change it, since she's giving free demonstrations of her motivations if you're willing to watch closely.
Krof_Gninut:motivational techniques for finishing those last two semesters
One motivational technique is that you don't have to finish now. You can wait and do a semester in a few years and the last semester a few years after that. You can start up a major you're actually interested in and even though you'll spend more time, you'll already have the nonmajor classes out of the way. You probably don't even have to go to the same college. Plus, you can see if a college degree even makes sense to you later on; it might not.