Is it possible...

[WaterBird]

Is it possible for a relationship between two otherwise reasonable people to become toxic because their personalities just don't match, but for both partners to then go on to have healthy relationships with others?
This came up in a discussion with one of my friends and I'm not really sure if this idea is true, but think it might have some merit.

I suppose it depends on what you mean by toxic. Arguments and belittling each other because you don’t gel as a couple is one thing.

Underlying personality issues (anger management, emotional dysfunction, contempt for the opposite sex in general etc) are something else.