overeducated
They argued controversially that overeducation of women or the working classes was a waste of time and money.
One of the greatest problems in the marketplace currently is overeducation.
Over-education occurs when people have more educational qualifications than they need to do their job.

SMART Vocabulary: related words and phrases

Teaching in general
asynchronous
chief academic officer
CLIL
clue
clue in
communicative
didactic
hothouse
miseducation
Moodle
multi-course
non-conditioned
non-didactic
popularize
sex education
show/teach someone the ropesidiom
socialization
socializing
special education
tutelage