watercolour and ink on paper

Inadequate

/ɪnˈadɪkwət/

lacking the quality or quantity required; insufficient for a purpose.

"these labels prove to be wholly inadequate"

Insecure
/ˌɪnsɪˈkjʊə,ˌɪnsɪˈkjɔː/ (of a person) uncertain...

Emotions Wheel
I have enjoyed working with the emotions I found in Plutchik, but there are so many more...