Maybe PFAS aren't as "bad" as lead in that the effects of lead are more noticeable in the short-term, but the widespread clinical health effects of PFAS across the entire human population is "bad." Bad is not really a useful enough word to measure the damage PFAS have done to human health. There's far more PFAS floating around inside people's houses, vehicles, clothes, foods than lead; so, I'd consider it worse than lead in terms of reach.