It's fine that you don't like it, but it's not garish. That's just not what the word means. MacBooks are literally the opposite of that:
adjective
gar· ish | \ ˈger-ish \
Definition
1 : clothed in vivid colors
//a garish clown
2 a : excessively or disturbingly vivid
//garish colors
//garish imagery
b : offensively or distressingly bright : GLARING
3 : tastelessly showy : FLASHY
//garish neon signs