It was going smooth then the story plot is too weak it feels like it's forced in there

I like the acting It's on point but the thing I hate about this is that the plot of the story is rather forced to be there. Like the plot was forcefully inserted into the story which made it worse. It took me 4 weeks to finish this Kdrama because of the weak plot and I was kinda irritated with how they made the flow of the story I just really wanted to know how it ended that's why I finished it. I was curious about the ending but man, the ending was not really kinda of satisfying in my point of view.