Are you counting in base10? I count[1] 6 terms of 4 years each = 24 years.
67% off. Not bad for government work.
If your argument is a Democrat in the governorship, since 1942 it's (R=47, D=30). Since 1958 it's (R=31, D=30). Republicans are at least equally to blame for California's governorship.
In practice, the governor is largely about qualities of a single person. The legislature is heavily skewed D/blue because that's how density votes in the US.