overrate
US /ˌoʊ.vɚˈreɪt/
UK /ˌoʊ.vɚˈreɪt/

1.
surestimer
have a higher opinion of (someone or something) than is deserved
:
•
I think you're overrating his abilities; he's not that good.
Je pense que vous surestimez ses capacités; il n'est pas si bon que ça.
•
Many critics overrate this new movie.
De nombreux critiques surestiment ce nouveau film.