New music is not new age music. New music is contemporary classical, and it is not composed using programs on a computer, generally (though some technology is involved in electronic work). Can you write music by hand at all?
If you do hiphop/pop, what did you submit in your portfolio? Did you have classical pieces? Or did you apply for piano and submit recordings of your playing? I am a little confused and am just trying to get a sense of your situation.
UCSD has one of the top programs in the world for composition at the grad level. Really top notch. The professors there are excellent.
I get concerned when an artist begins with a career goal (film work for instance) or wants to focus on getting connections that will help get a job. The work itself will get you a job, or, at least, commissions. If you feel compelled to write music, just do it, learn and develop, and see what happens.
As for your main question, yes, there are schools that might be better for your interests, such as Berklee, Belmont, Miami Frost, Cal Arts, Columbia College (Chicago). You might also be interested in music production given your focus on computer work.
UCSD does not have a music school, but has a music department. So you are enrolled in UCSD, not a music school that is part of UCSD. So you have the freedom to go on campus and take classes in music if you like, to see how you feel, and also to take classes in any other subject. You can explore and decide on major later.
Academic music is different from what you want to do. It is an intellectual/artistic rather than practical endeavor for the most part.
I haven’t heard your music and might not be able to evaluate anyway, but if you had a portfolio that got you in, and are currently making music in whatever way you enjoy, perhaps you can find other ways to evolve musically or make money with it.
A lot of composers in PhD programs aren’t making much money, that’s for sure: it’s a calling so they do it for the love of the music.
Do you have any favorite composers? Did you apply to UCSD for a reason?