unsympathetic vs unappealing

unsympathetic and unappealing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unsympathetic	No	Yes	No	No
unappealing	No	Yes	No	No

As adjectives, unsympathetic and unappealing are synonyms defined as:

unsympathetic and unappealing: (of characters in literature or drama) tending to evoke antipathetic feelings

Other synonyms of unsympathetic include unlikable, unlikeable.

unsympathetic (adjective)	unappealing (adjective)
not sympathetic or disposed toward	not able to attract favorable attention
(of characters in literature or drama) tending to evoke antipathetic feelings	(of characters in literature or drama) tending to evoke antipathetic feelings
not agreeing with your tastes or expectations
lacking in sympathy and kindness
not having an open mind