I am not trying to be an ass but, UCB accepted just 47 CS transfers last year from all sources, that’s 7% of applicants. That is more selective than MIT’s freshman admission.
http://www.universityofcalifornia.edu/infocenter/transfers-major
Your odds of transferring into UCB for CS are really long, no matter where you study freshman and sophomore year. There simply aren’t many seats to be had. A 4.0 and killer ECs from Northride still might not do the trick - but, that is also true of any CC in the land.
If you were interested in UCSC or a more accessible school, switching to a CC for TAG might make sense but, it sounds like that’s beneath you.
All that said, you are at a very good school, stop pining for what might have been and make the most of the opportunity you’ve earned.
Good luck