How you do in your upper division courses and in independent research, etc. is what matters. You may wish to spend 3 years (instead of 2) at the 4-year in order to assimilate to the proper level. Many, many students (including STEM majors) very successfully transition to UC Berkeley from community college each and every year- so much so that it is a “regular path.” UC Berkeley is one of the most rigorous and fast-paced schools in the nation.
There may be an adjustment period, but education through Community College is a viable option, and indistinguishable a few years out from direct 4-year.