When you've been at the receiving end of a toxic love, it changes you. You grow more aware of what unhealthy traits look like, and beyond just spotting those in other people, you also catch them within yourself. You see your red flags and you feel motivated to work on them because you don't want the people in your life to hurt over your wounds; over your negligence to overcome them. That's maybe the most important lesson you learn, coming out of a relationship that was ugly and damaging - you learn that people carry baggage inside them, and that it's up to them, whether they are okay projecting their pain onto others or taking the tougher path of untangling their own mess. It teaches you not to be the toxic person in someone else's life, because you've witnessed that. You've been with people who refused to address their pain and treated you unfairly for it, and it's made you understand how important it is, to do the deep work. To heal your hurt, for your sake and for the sake of those around you.