Language often reflects our thoughts. There’s a reason we don’t say “I am a broken ankle” and “I am a fever”. And yet when it comes to emotion we say “I am depressed” or “I am angry”.
There’s a chicken and egg problem regarding influence of language on thoughts (or vice versa), and I can’t solve that. But I can tell you that it’s easier to recognize the impermanence of your current emotion if you just think: “For the time being, I feel angry”.
This too shall pass.