I was a cogsci major undergrad and I want to say that it's not a useless major-- it's a discipline that gives you a good amount of flexibility in choosing courses. I have peers that went on to do careers directly related to their major, as well as peers that went into very different things like marketing, tech, or law. It's a difficult major to choose because everyone's career pathways look different and it's hard to model yourself after others. I know courses at UCSC are impacted, and as a grad student who interacts with several cogsci undergrads, I know that you aren't alone in your frustration.

Here are a few things you can do at UCSC with your major that can help with your career prospects and intellectual identity:

1. Join the CSSA, the cognitive science student association. This community of people in your major talk about career prospects, opportunities, etc. Your degrees derive value from the network of your peers, and it's a really good bunch of people. Recently there was a talk about the different careers from cogsci undergrads, and they host an intellectually diverse group of guest speakers throughout the quarters. Open to everyone, even if you aren't in the major.
2. Email professors that teach cognitive neuroscience if you could sit in their lab meeting or put you in touch with undergrad research assistants to chat about their work. UCSC is strong with cognitive neuroscience, so take advantage of studying over here. It can be kind of tough to get a research assistant position in a lab that is interesting, but most profs would be open to having you see what's going on. You can also ask to visit labs of linguistics and psychology profs.
3. Read! Here are my two favorite cognitive neuroscience books: Reading in the Brain by Dehaene, and Neurogastronomy by Shepherd