Personally, I'd say "weird subjects" - or, if not weird, not marketable. The proverbial "basket weaving" degree or stuff like that. I think the more common "liberal arts" line as well.

https://blog.prepscholar.com/worst-college-majors

https://www.salary.com/passages/8-college-degrees-with-the-w...

https://www.ownyourownfuture.com/most-useless-degrees/

What I find interesting in these articles (and others) is CompSci is listed as a bad investment... oversaturation and what not.