Wiktionary
a. 1 not supporting 2 not assisting
WordNet
adj. not furnishing support or assistance [ant: supportive]
Wikipedia
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Usage examples of "unsupportive".
Because they misunderstand the intended meaning, they commonly react in an unsupportive manner.
Women generally don't realize the ways they communicate that are unsupportive and hurtful to the male ego.
Men generally don't recognize the was s they communicate that are d srespectful and unsupportive to women.
When a conversation becomes unloving and unsupportive some individuals instinctively begin to fight.
Occasionally in the past I have considered buying a small driveship, but either finances were unsupportive or I did not desire to hamper myself with the company of those I did not trust.
This withdrawal, I think, was an effort to pull away from this—what I think he perceived as a—very dangerous, unnurturing, unsupportive world out there….