You may be staying in an unhealthy relationship or toxic job because you don’t want to risk the alternative. It’s indeed a risk. You may not engage in a better relationship or find a better job. But it is a risk worth taking.
The earlier you renounce these miserable affairs, the better off you are for the remaining days of your life because they kill your soul slowly over time. They degenerate and oppress you mind. It does not matter if you think you have gained the ability to handle them. Sooner or later, you will be infected by the distressing culture, until you become one yourself.
If you don’t prepare yourself to get out of any grim undertaking, you will be trapped by your own circumstances forever.