Getting into negative SEO, which is all about intentionally harming a rival's website ranking, is not just shady, but it's also risky. It breaks all sorts of rules and could land you in legal trouble, not to mention the damage it does to your reputation.
Instead of going down that road, it's better to focus on legitimate ways to boost your site's SEO, like creating awesome content and building solid backlinks. Keep an eye on your site's performance, and if you suspect any foul play, maybe it's time to talk to a legal pro. Just remember, playing fair in the digital world is always the smarter move.