he was never slow to express his dissatisfaction with the service he received.
Examples of dissatisfaction
dissatisfaction
Schwab is cleverly playing off public dissatisfaction with Wall Street research.
From the businessweek.com
There can be much dissatisfaction with those who are supposedly in charge today.
From the charlotteobserver.com
Three years in gestation, the idea for the festival sprang from dissatisfaction.
From the telegraph.co.uk
Only two percent reported any dissatisfaction with the device on either carrier.
From the us.cnn.com
Anger at austerity is likely to be just one component of public dissatisfaction.
From the economist.com
A quick search through the internet forums reveals overwhelming dissatisfaction.
From the guardian.co.uk
Both parties remain committed to budget cutbacks despite public dissatisfaction.
From the omaha.com
You've already asked him about it and presumably expressed your dissatisfaction.
From the charlotteobserver.com
The choice of an existing work by a French sculptor caused some dissatisfaction.
From the en.wikipedia.org
More examples
The feeling of being displeased and discontent; "he was never slow to express his dissatisfaction with the service he received"
Contentment is the experience of satisfaction and being at ease in one's situation.
Unhappiness or discontent; the cause of such feelings
If for any reason you are unhappy about the quality of service provided, or the amount of our fees, then you should take the matter up with Mr. Tom Queen who will ensure that any such complaint is fully investigated, and that you receive a detailed response within ten working days. ...