Nah, majority of (former) bullies just don't care. Their reaction vary from complete indifference, through it being a funny memory up to continuing bullying late into adulthood. Sure, there are situations where your former bully becomes a homeless drug addict and you are successful later in life, but at least where i live i heard way more situations that are complete opposite, simply because bullies are often popular kids - extroverted and outgoing and that helps A LOT in life, where a victim will usually be opposite - this introverted, quiet kid that will get used by people and can't/won't fight back. There are sometimes other factors at play too - victim being poor for example.
I heard enough stories where a victim, decade or more later, is still dealing with mental consequences of the bullying in school, and even if he was book smart couldn't really use that for his benefit and is living alone/with parents working some entry level job because he can't land anything better. While bully is working a decent job, and just built a house for his wife and 2 kids. While still laughing at his old victim if he spots him outside.
Real world is cruel and anything but fair. and there's no divine retribution or karma - unless you bring it yourself. That's why fighting back as early as possible is usually the best strategy and parents giving their kids advice like "just wait for them to get bored of it" or "be the smarter one" are unknowingly massively harming them
