"bitter decision" is correct and usable in written English.
You can use it to describe a difficult decision that has negative repercussions. For example, "After much consideration, she made a bitter decision to break up with her long-time partner."
Putin: A Bitter Decision.
"The first wealth is health, and hence this bitter decision," the 62-year-old wrote on his official website.
"This was a black and bitter decision, but we swallowed this bitter decision in the interest of future generations," said Fazlullah Mojadeddi, a member of Parliament from Logar Province just south of Kabul.
This program narrates the circumstances leading to President Putin's bitter decision to trade U.S. approval of the war in Chechnya for what has proved to be a diminished role in world politics.
As he said Thursday: "The bitter decisions were taken consciously and with an eye on the future".
Theresa May would be mad not to seize her honeymoon moment to sweep those seats from Labour before those bitter decisions must be taken.
Mr. Fischer, who met with Mr. Schröder at lunch on Sunday to discuss the nuclear sale, said last week that sometimes "bitter decisions" had to be made.
Mr. Holder was right to sound bitter about the decision at his news conference on Monday.
She was extremely bitter about the decision at the time, given how hard she had worked to get into Smith.
Rooney said that his team-mates all felt bitter about the decision and believed it had cost the British team an almost certain medal in the final.
The Portuguese champions are still bitter at the decision of their former manager to leave after overseeing their record-breaking season, in which they won four trophies including the Europa League.
