my fellow weebs, what's a good 和訳 for "quixotic"

google and various dictionaries keep giving me 浪漫的 but i feel like that doesn't really get all the shades of meaning, being quixotic means not just being a romantic but having an ideal of oneself as a kind of knight-errant despite it not really being the case

and if i just say キホーテ的 i'm afraid people will think i mean the clothing store