quixotical
/kwɪksɒˈtɪkəl/Definitions
1. adjective
excessively idealistic, unrealistic, or impractical, especially in relation to problems or challenges.
“The quixotical young entrepreneur was convinced that her startup would change the world, but it ultimately failed to gain traction.”
2. adverb
in a quixotical manner
“She approached the problem in a quixotical way, but her solution was ultimately flawed.”