If Citi wanted to truly combat high attrition they could do so by not giving out overwhelming amount of work and fostering abusive managers and also pay a decent salary. Citi will take everything you have to offer and then some more regardless of toxicity so long as you are willing to put up with it. The only thing that matters to the key players at Citi is how much work can they squeeze out of you for the cheapest price.
Stop working until you faint from exhaustion. Stop putting in 16 hours per day. Stop skipping lunch. If nothing else, when it all comes down to it. If you don’t like your environment, then change your environment. Even if that means seeking a job somewhere else.