@joonbai -- written very coherently and and also brave! hahahha... so you do ask very pertinent questions. the problem is the drama is really badly written that lot of these relevant questions are actually being buried.
so Q1. do those who make mistakes - do they have a right to be happy? like you said kunal and nandini are human but the CVs failed to humanize their characters enough to see them as just people. the disconnect is why people are not able to accept their actions. people have so much issues against cheating but lets think about it this way -- in how many dramas, does the guy dump his girlfriend and marry some girl he does not know but we are all supposed to be cheering for the wife. never mind the energy, love and commitment the girlfriend put in because she will always turn out to be evil. but what if she isn't? then, didn't he just betray her? break her heart? if we think about it that way, we are used to people breaking commitments all the time on ITV but we accept it as we are able to understand the situation sucks. here, the reason people are not able to relate to these characters at all is mostly a flaw in the writing.
Q2. were there issues in kunal's marriage? and is mauli painted too white? I would agree and disagree with you. people would say that this marriage was perfect but there is no such thing as perfect and so something went wrong somewhere. the problem is again the writing because it hasn't been conveyed in a direct manner. we are having to guess at the issues and that's a problem. most people watch dramas for time pass and don't really have energy to spare to figure out things. also, we love things over-explained to us for the most part. we love the zingers, the overdramatics. here, we got way too many stares and silences and we had no idea what these characters were thinking. would agree with you in some sense that mauli got painted a bit white in some sense but there were flaws very visible for those who wanted to see. again, she too came across as a bit of cardboard character and some of her actions don't really match with the sketch we got. for example, why on earth is she listening to those ladies and sitting in the house and crying and crying and crying? because the CVs have decided that the easiest way to get people involved is to see mauli cry buckets. well, maybe it works for some but for some, it is just plain annoying. there's only so much rona dhona I can take before I switch off and start fiddling on my phone. I watch tv as a time out.
Q3. should one stay in a loveless marriage? -- now that is the kicker of a question and is something we should be discussing. our divorce rates are rising and the two reasons I hear over and over are either lack of compatibility or EMA. now, who knows what actually happens in some of these marriages but our society is changing. while people still believe in marriage, there are also people who are no longer willing to accept less. maybe not as dramatically like in some parts of the world but if we look at the last census, there are 3 times more separated population than divorced. why is that? so in that case, the questions we should be asking is what does it take for a marriage to be successful? what kind of work should one be putting in? what kind of issues can lead to distance? what kind of scars can lead to emotional impairment that might impact relationships? what do people want and require in a marriage? how is society changing and why aren't people willing to accept less?... so many pertinent issues could have been discussed through this drama but the writing didn't really explore that.