What's the adjective for negativisms? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs negate, negative, neg and negativize which may be used as adjectives within certain contexts.
“Furthermore, the plausibility of a negativistic personality orientation with chronic discontentment set in an oppositional and resentful posture may be worth considering.”
“When this occurs, it usually leads to negativistic expectancies for the future of the relationship.”
“Structural models revealed that aesthetic, moralistic and negativistic attitudes were the stronger predictors of support.”