ok, this is i think normal then. my CPU has 4 physical cores with 2 threads each, so 8 threads total. yours has 2 physical cores with 2 threads each, so 4 threads total... and the performance is roughly 1/2 mine.
until Ryzen came out, AMD was pretty far behind intel performance wise, both single-threaded and multi-threaded. but the ryzen architecture is supposed to be pretty awesome.
rob