In a few years when your degree enables you to have a good job and a good life, you'll be glad you did it. I know that doesn't help with your feelings right now, but focusing on the long-term got me through a lot of stuff.
If you aren't getting a degree that will enable you to have a good job and a good life, that's the problem right there. In that case, your instincts are on target; you are in job training that is not really training you for a good job, so what you're doing doesn't matter.
see, I've been hearing that pretty much every degree I'm interested in (or think I'm interested in) is over-saturated with applicants, and the economy is so shit and the job market is so shit that even college degrees don't mean much and college graduates can more often than not be stuck working dead-end minimum wage jobs.
Furthermore I'm not even that interested in making money. I just have to get a job and make money to live. Because society works like that. Not very motivating.
1)There are always jobs so long as you are willing to think outside the box. I know a musician friend who's doing OK with singing gigs and tutoring jobs, they're also planning to go into voiceacting for ads and things like that. Standard career paths are kind of filled up, but frankly that's always been true. There's always room for people who are good at what they do, and there's lots of ways to manage a career outside of the standard get-hired-and-promoted paths.
2) Forget 'interested in'. Guidance counselors keep giving this terrible advice to 'do what you're interested in' and it drives me nuts. People are interested in lots of things that they're terrible at, or they love something but they couldn't stand doing it all day, or nobody wants whatever they're interested in. Forget 'interested in'. What you need to find is the overlap between 'I can tolerate this for 8 hours a day' and 'people will pay me to do this'.
No job is going to be interesting for all or even most of the day. Don't worry about interesting. Find out what the working conditions you can tolerate (solitary vs talking with people, travel or no travel, physical activity or desk work, fast paced or slow paced, etc) and find out how those line up with the fields you can stand dealing with all day. This will determine if you can actually do a good job or not. Most fields have a variety of working conditions. I think pharmacy tech and research-heavy fields are the only ones that are super limited.
Archeologists go on lots of digs, if you have a bad back that's probably a bad field, even if you love the thought of traveling to exotic places and discovering pottery shards. BUT you can probably find museum jobs that accommodate that bad back.
IT people spend lots of time doing mind-numbing tasks and/or writing code to avoid mind-numbing tasks and explaining what they do to people who literally yell that they don't want to understand it just fix this crap. If you can tolerate that, look into IT. BUT lots of IT jobs also involve troubleshooting individual customer issues - lots of movement and dealing with people. IT salespeople and IT lawyers are a few fields that are very valuable.
Plumbers and electricians make a lot of money and are always in demand - if you like working with your hands, don't mind smells and have good visual-spatial sense that fields makes sense to look into. They're also pretty in demand for big building projects construction phases.
3) Don't think of money as a thing in and of itself. That kind of thinking is a trap - either people hoard it or don't care about it (ex, you). Both approaches are foolish. Think of money and grades as the ability to do what you want.
Your bank account? It's the ability to buy lunch out, or by a new car, or vacation someplace nice, or have a kid. Your grades? They're what gets you in the door to people you want to impress professionally. It's not about $$$$, it's about the power to stand on your own feet and fulfill your dreams.