Phrases Phrases for Complaining Politely

I'm not entirely happy with...

Meaning

Expressing dissatisfaction in a mild way.

John: The service was a bit slow.
Alice: Oh dear, I'm sorry to hear that.
John: Yes, <b>I'm not entirely happy with</b> the speed of the service.
Alice: I'll speak to the manager. We really appreciate you letting us know, <b>I'm not entirely happy with</b> situations like this either.