turn against
Intermediate (B1)neutral
To change from being on someone's side to being against them.
"After the scandal, many of his closest supporters turned against him."
Hear it in context

I Can't Deal with VTubers Anymore
ConnorDawg · 12:10
Turn against you.

AI Experts Debate: The AI Labs Are Lying To Everyone, Is There A 99% Chance Of Human Extinction?
The Diary Of A CEO · 142:31
And they that could turn against humanity.

IS TRUMP WRONG ABOUT THE AI RACE?
The Diary Of A CEO · 0:11
And they that could turn against humanity.

Trump Is the Greatest At One Law Of Power — And It Could Destroy Him - Robert Greene
Triggernometry · 26:41
You know, suddenly people turn against you.

Trump Is the Greatest At One Law Of Power — And It Could Destroy Him - Robert Greene
Triggernometry · 27:51
then the game will turn against you.