In short, the episodes are way too long, its filled to the brim with redundant tropes and its boring.

In long, I'm sorely disappointed with this so before get into the bad stuff let me mention some positives;
1. The actors. I think they're easily the strongest point if LND.
2. There are parts that hits you in the feeling. Mostly the ones involving Seokryu and her family. The family dynamic was an interesting one as a whole.

Now this series might have some good points but those positive points can be seen in many other dramas which aren't this boring. So many things are thrown in the mix here which had little to no pay off. For example the plot with their exes. None of them add anything meaningful to the story so why are they there? Or the plot twist about Dan ho and his kid? Or Mo eum mother disagreeing with her relationship so passionately just to change her mind so easily. Or even her moving to north pole. None of them had any impact whatsoever so why were they included?
The episodes where so long you could feel them trying to stretch out the story thin to fill up the run time and it was annoying. The slow burn wasn't a satisfying one. It was painfully slow. I used the skip button alot in later half of it.
The comedy bits are stale too honestly. Every woman was bickering and shouting over stupid misunderstandings that could've been resolved in minute had they talked it out but all the parents here are NOT comically immature.
This could've been a more enjoyable watch if it was shorter and had less overused tropes.