The phrase "a much more negative" is correct and usable in written English.
It can be used when comparing the negativity of two or more things, emphasizing a greater degree of negativity.
Example: "The recent report shows a much more negative outlook on the economy than previous forecasts."
Alternatives: "significantly more negative" or "far more negative".
Nénette, by contrast, offers a much more negative reflection of humanity – one whose pessimism Philibert appears to share.
Perhaps because they are such a maligned bunch, millennials tend to have a much more negative self-image than other generations do.
But on the other side are people who have a much more negative view of globalisation and modernity – and in particular, the large-scale movement of people.
The Personal Health column "Fresh Warning on Perils of Piercing" paints the piercing industry and the act with a much more negative brush than is appropriate.
"If the market really believed there was a high probability of default, you would see a much more negative reaction," said Donald T. Ellenberger, the head of multisector strategies at Federated Investors.
But it also produced a much more negative 60-second commercial that attacks Newt Gingrich, the former House speaker who is suddenly threatening Mr. Romney's status as the Republican front-runner.
The unique power characteristics of this hydrous vanadium oxide are reasonably attributed to its intrinsic porous and crystalline structure produced by means of this novel anodic deposition process at a potential much more negative to the oxygen evolution reaction.
This work also emphasizes that anodic deposition of vanadium oxide does occur at a potential much more negative to oxygen evolution from aqueous VOSO4 solutions due to the presence of V5+ by adding H2O2.
At the same time, the image of a drunken woman was perceived with much more negative attitude than the image of a drunken man by both male and female respondents.
A fall in sterling has much more negative consequences.
They dislike politicians so much that even being asked for their opinion of elected officials, as they were in a version of the survey, makes them much more negative about how their own lives are going.
