Is it possible for couples to rebuild a happy marriage for the sake of their children, and how can they go about doing that?

Before the iPhone, how did people access the internet and send emails if they were outside the house and without access to a laptop of computer?
Why do I feel flawed people who show their bad side first then reveal their good size are humanized, but people who show good side first then to reveal the bad side afterwards are stigmatized for eternity? Isn't this unfair?