If you're looking for a noun related to dissatisfaction, here are some options:
General:
* Dissatisfaction: This is the most direct noun form of the adjective "dissatisfied".
* Discontent: This word refers to a general feeling of unhappiness or lack of satisfaction.
* Unrest: This word suggests a state of agitation or disturbance due to dissatisfaction.
More specific:
* Complaint: This noun refers to a formal expression of dissatisfaction.
* Grievance: This word refers to a cause for complaint or protest, usually arising from a feeling of injustice.
* Disappointment: This refers to a feeling of sadness or frustration when something does not meet expectations.
The best noun to use depends on the specific context.