I don't understand what Kohli's performance has to do with marrying a Bollywood actress. Have we yet seen a player who played well his entire career, never having a bad performance? Or has he ever gone through a bad time? Kohli has been a very consistent player. Suddenly his performance deteriorated. I think this is because of Kohli's overconfidence. If he is more diligent then maybe he can return to form.
There is no logic to talk about Kohli and his wife. As it refers to his personal life. However, Kohli has not been able to get rhythm on the field for many days. I think he needs to break from the main squad for a few days. I think a little break may bring him back to his previous place. Just remember that performance in cricket is not always would be the same.