how to ruin good storyline!

bad ending . (not sad ending it's bad ending) basically yes it's sad ending but more than that it's bad ending
good character,
great acting and chemistry between lead,
rematch value is 0

writer just ruin good storyline, it's not just sad ending it's actually bad ending , writer be like i want to end this drama what should i do ohh let me think i just kill the one of the main lead and just make fool everyone and make open ending like he/she is alive may be