frustrating
adjective /frʌˈstreɪtɪŋ/
  /ˈfrʌstreɪtɪŋ/
- causing you to feel annoyed and impatient because you cannot do or achieve what you want- It's frustrating to have to wait so long.
- The frustrating thing is, they probably won’t even be in when we get there.
 Extra Examples- It was a demeaning and ultimately frustrating experience.
- It was rather frustrating for all of us.
 Oxford Collocations Dictionaryverbs- be
- prove
- become
- …
 - extremely
- fairly
- very
- …
 - for