The phrase 'unjust decision' is correct and usable in written English.
You can use it when you wish to describe a decision that is perceived to have been made in a way that is not fair or reasonable. For example, "The judge's unjust decision to deny her appeal left her feeling oppressed and helpless."
"We deplore this weak and unjust decision," they said.
"It is a completely unjust decision," McQuaid said.
"It is an unjust decision and designed to destroy peace," said Osama Abu Sharq, 47, a shopkeeper.
After the sentencing Ms. Berenson was handed a microphone by her lawyer and said, "I believe this is an unjust decision".
They relish the chance to go into bat on behalf of their client against an unwieldy bureaucracy and put right a manifestly unjust decision.
"We deplore this weak and unjust decision," they said of the charges, which they dismissed in a meeting with reporters later as nothing more than a "witch hunt" and an "expensive sideshow".
And the Castro party took unjust decisions against Cuban Christians expelling many members of the foreign clergy from the island.
He said the initiative was intended to counter aspects of federal immigration laws that may result in inflexible and unjust decisions to deport legal immigrants.
The world may come with unjust decisions, but it is our job to ensure we never remain silent in the face of oppression.
In a joint letter to The Independent, Citizens Advice and Shelter said proposed £220m of cuts in the £2bn-a-year legal aid budget would restrict people's right to challenge unjust decisions by government bodies through judicial review.
The South Carolina video appears in a different context, in the wake of the Black Lives Matter protests that have followed the unjust decisions by state and federal prosecutors in case after case across the country not to prosecute cops who've killed unarmed black men.
