In the style of "The Day After" I take it ...
Threads just seems like torture porn being shown to you to make you afraid of nuclear war, which had its uses in pushing for nuclear disarmament, so I can't hate it...
but The Day After does a lot more to personalize and humanize the story, each subplot makes you very intimately attached to these characters and their families by presenting their day-to-day life and aspirations, how normal their lives are when war is looming echoes our own. So when everything is blown to shit it hurts so much more.
Threads is much worse.