There is no human who can claimed themselves as "perfect".
So being "perfect couple is just a delusional idea.
RubiNav do have mature understanding between them which shows their love and respect for each other.
BB might have wanted to see they will argue but they are not able to get that masala.
They does have disagreements as well as both have different perspective to play this game.In a way,it can hamper both of them but not their relation😊