frustrating
US /ˈfrʌs.treɪ.t̬ɪŋ/
UK /ˈfrʌs.treɪ.t̬ɪŋ/

1.
frustrant, agaçant
causing annoyance or upset because of an inability to change or achieve something
:
•
It's frustrating when you can't make progress.
C'est frustrant quand on ne peut pas progresser.
•
The slow internet connection is very frustrating.
La connexion internet lente est très frustrante.