OK, Mr. Grammar Policeman, I submit:The correct word is uninterested.
=================================
dis·in·ter·est·ed
disˈintrəstəd,disˈin(t)əˌrestəd/
adjective
- 1.
not influenced by considerations of personal advantage.
"a banker is under an obligation to give disinterested advice"
synonyms: unbiased, unprejudiced, impartial, neutral, nonpartisan, detached, uninvolved, objective, dispassionate, impersonal, clinical; More
- 2.
having or feeling no interest in something.
"her father was so disinterested in her progress that he only visited the school once"
synonyms: uninterested, indifferent, incurious, uncurious, unconcerned, unmoved, unresponsive, impassive, passive, detached, unenthusiastic, lukewarm, bored, apathetic;
informalcouldn't-care-less
"he looked at her with disinterested eyes"
=============================
un·in·ter·est·ed
ˌənˈintrəstəd,ˌənˈin(t)əˌrestəd/
adjective- not interested in or concerned about something or someone.
"I was totally uninterested in boys"
synonyms: indifferent to, unconcerned with, incurious about, uninvolved with/in, apathetic to, lukewarm about, unenthusiastic about, bored with
"I couldn't live with someone uninterested in world affairs"
- not interested in or concerned about something or someone.