Yes, I personally think so. It's a difficult comparison because the effects of Facebook are not obvious physically, like e.g. tobacco is. That makes it even more dangerous because it seems safe. But the negative effects of mental health and misinformation (politics, health, etc) also indirectly kill people or make them miserable, it's just not a direct association that's easy to measure. These effects probably have a larger negative impact on the world overall than something simple with obvious effects like tobacco.