I'm not sure I can (or at least have the energy to) put a rebuttal into a short reply. Hemingway certainly had a sparse writing style, which doubtless reflected the fact that he had been a reporter. At the same time he spoke to major themes and values. I probably consider Farewell to Arms to be his best book.

That said, I can understand someone objecting strongly enough to his themes to not enjoy his novels as literature. (The same could be said of Fitzgerald in the same general timeframe.)

But I have trouble seeing how any of that translates into an argument for poor writing unless the lack of overly ornamental writing be considered a flaw.