Excessive doomscrolling is probably not healthy for anyone, because anything done excessively will inevitably end badly, including doomscrolling and even gambling. However, if you're asking about the negative impacts of either, they actually won't be harmful if we can control ourselves and don't become too careless with either of them on a daily basis. However, for someone who may have become too addicted to either, I think the most significant negative impact is doomscrolling, because on social media, there's a wide variety of content mixed together when we scroll every day, from sexy women to crime news and even corruption news that can incite anger among readers.