To be honest why so many manhwa look like forced to be end now?

That and all of them are on hiatus right now, I’ve picked up so many recently and they’re on hiatus randomly

The publisher usually contracted with author per season. If its a new author, its usually starting only one season and they see how much money/people buy it. If its good, season 2 is guaranteed. But if its not, publisher will choose so end it sooner--> just add chapters for closure. Nowadays economy is not that good.