Fix grammaticality: The researchers of the innovation may receive poor feedbacks in the prior market research, or someone even regard the researchers as idiots.
The researchers of the innovation may receive poor feedback in the prior market research, or someone even regard the researchers as idiots.

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The researchers are not the only ones who have been criticized for their lack of understanding of the language of the, but they are the ones who have been the most vocal in their criticism of the researchers.
The researchers are not the only ones who have been criticized for their lack of understanding of the language of the language of the language of the language of the language of the language of the language of the language of the language of the language of the language of the language of the language of the language