The phrase "disaffected by" is correct and can be used in written English.
It means to be dissatisfied or disillusioned with something or someone. It is often used to describe feelings of alienation or rebellion. Example: The students were disaffected by the strict rules and regulations of the school, leading to frequent protests and walkouts.
Reformasi became the rallying cry of all those who felt disaffected by the corrupt autocracy that Malaysia had become.
Because the vocation of Liberalism is not to be a leftwing ghetto for people disaffected by the Labour party".
The network's opinion shows overwhelmingly cater to conservatives and Americans who are disaffected by the Obama administration, and critics say many of its news programs do the same.
Most members are ethnic Uighurs who have become disaffected by China's policies in Xinjiang that tend to favor ethnic Han, the dominant group in China.
The cable noted the Sheikh's growing appeal among the young, the lower classes, and those disaffected by discrimination and the kingdom's economic malaise.
As for Corbyn, beyond his repeated promise to "listen to everyone" he had little to offer the disaffected by way of conciliation or common ground.
And, he might have added, many of those fans have been disaffected by violence around the stadiums, along with a legacy of match-fixing among players.
Senior players had quickly become disaffected by his methods, the team's performances too often flat and lacking zest, with the manager bristling at criticism from outside.
They predicted that people were so disaffected by the war and the insecurity and the lack of progress from the government that many would not vote.
Other Brotherhood members fear that a small minority of members disaffected by recent events may take the future in their own hands.
"I was disaffected by Blair, but now it's time for change, for people to unite and make right what is wrong.
