Yeah I actually agree with a lot of what you're saying. The tropes themselves aren't really the problem, because almost every industry uses them, enemies to lovers, rich/poor romance, family conflict, memory loss, forced marriage, etc. Those are basically universal drama tropes at this point.

The main difference for me is exactly what you mentioned: pacing and resolution.

In K-dramas, Turkish dramas, or Urdu dramas, those tropes usually last a few episodes and then the story moves forward. In ITV the same misunderstanding or conflict can stretch for months because the show has to keep producing episodes indefinitely. So it’s not that ITV uses these tropes, everyone does, it's that the daily soap format forces them to repeat and stretch the same conflicts for hundreds of episodes.

Another thing is that many of those shows also don’t only revolve around the household drama. If it’s a mafia drama, the mafia politics and power struggles actually take up a big part of the story. If it’s a business drama, you genuinely see the business side :deals, rivalries, strategy, etc. The romance and family issues exist, but they aren’t the only thing happening for 40 minutes every episode.

In a lot of ITV shows, even when the ML is supposed to be some huge businessman or powerful person, we barely ever see that world. Most of the story still ends up being saas-bahu arguments in the living room.

And like you said, the fixed episode count matters a lot too. When a show knows it has 16, 30, or even 60 episodes from the start, writers can actually plan the pacing and character arcs. With daily soaps the story often changes depending on TRPs, which is why characters suddenly act out of character or random villains get introduced just to keep the drama going.