Everything turned sour for me there.

对我来说那儿的一切都变得令人失望了。

《柯林斯英汉双解大词典》

The milk has turned sour.

牛奶变质了。

《新英汉大辞典》

Once Spain’s construction boom turned sour, their jobs went quickly.

一旦西班牙的建设繁荣期恶化，他们的工作也就不保了。

youdao

The court heard that Howson's relationship with Shakira Ramdihal turned sour after she became pregnant.

BBC: Heathcliff actor James Howson's arrest ordered

We then had a good rally for a couple of years until things turned sour again.

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Prickly at the best of times, Japanese-Chinese relations have turned sour with mutual accusations of lying.

ECONOMIST: North Korean refugees