Style of design poorly rated by company (3,4)
I believe the answer is:
art deco
'style of design' is the definition.
(I've seen this before)
'poorly rated by company' is the wordplay.
'poorly' indicates an anagram (a poor spelling).
'by' says to put letters next to each other.
'company' becomes 'co' (abbreviation).
'rated' is an anagram of 'artde'.
'artde'+'co'='ART DECO'
(Other definitions for art deco that I've seen before include "Do trace (anag) - style of the 1920s and 1930s" , "Geometric style of ornamentation" , "1920-30s design style" , "Style of decorative art popular in 1920s and 1930s" , "Nineteen twenty's and thirties style" .)