On the contrary, I believe they are. There are thousands of miles of back roads in California built and maintained by Caltrans that are in absolutely incredible condition. Drive up and down any random mountain/hill/pass off a main freeway and enjoy a road the envy of almost anywhere else: well-built, smooth, with painted lines and signage.

880 and 101 suffer because their high traffic volumes cause much higher wear and tear while also making it difficult to make repairs.