This is such a bad argument:

a) You are allowed to dislike cheap stuff, in fact it is common in western culture to dislike art where it is obvious that the artist cheaped out.

b) Never in the history of western art critique has there been a requirement that the critic is able to do better then the artist (let alone for cheaper). As the saying goes, “I may not be able to pilot a 100000 ton cargo ship, but I can tell when one is stuck in a canal.”