Season 1s are great, setup, some payoff, a bit of lead into the overarching story. Then season 2 to X. The heroes win and then lose in the final episode, cliffhanger to next season. People get bored. Final season is announced and they wrap up the show.
I’m confused by your question.
Is your objection cliffhanger endings? Those are more common in American media. Or is it lack of plot progression, which is common across all media? Even shows famous for moving the plot forward never stray too far from the start.