The phrase "a less satisfactory" is correct and usable in written English.
It can be used when comparing the quality or effectiveness of something to indicate that it is not as satisfactory as another option.
Example: "The new software update has proven to be a less satisfactory solution compared to the previous version."
Alternatives: "a more inadequate" or "a poorer".
They were willing to go to a less satisfactory part of town to make themselves more competitive.
On the other hand, some of the recent mood music from official Washington points in a less satisfactory direction.
High removal efficiencies were attained for carbamazepine and ibuprofen while a less satisfactory performance was observed for clofibric acid.
Glenoid radiolucent lines were present in 58% of cases and were associated with a less satisfactory objective result.
Campaigners are concerned that the G8 will deliver a "gold standard" for itself but offer a less satisfactory agreement for poor countries, which lose three times as much in tax evasion as they gain from aid.
When the tiles are plain, in good colours or textures, they are very attractive and appropriate, but often they are made to imitate stone, brick, mosaic, or other materials, and the results are generally of a less satisfactory nature.
Nevertheless, this, and a less-satisfactory settlement of the Iranian claim to the Greater Ṭunb and Lesser Ṭunb (Ṭunb al-Kubrā and Ṭunb al-Ṣughrā) islands with the neighbouring Raʾs al-Khaymah emirate, led some Arab states to sever diplomatic relations with Iran and Britain.
A slightly less satisfactory alternative was the setting up of plants to assemble imported parts or semifinished materials into consumer goods that were immediately exported, thus taking advantage of Latin America's low labour costs, particularly for women workers.
ANN prediction of effluent ammonium, BOD5 and total suspended solids was good when compared to mechanistic WWTP model predictions, whereas prediction of effluent COD and total nitrogen concentrations was a bit less satisfactory.
So as Martinez smiled his way through his post-match news conference, Norwich City were in the process of cancelling their end-of-season dinner to focus minds on their growing relegation fears, while Newcastle United's point at West Ham United suddenly looked a little less satisfactory.
Therefore these SDD values imply to have a rather less satisfactory reliability for assessing individual changes in comparison to group changes.
