To be fair, the vast majority of shark species rarely even interact with humans. Those that do, rarely attack. In fact, humans pose a greater threat to sharks than sharks do to us.
Still, sharks do attack humans. In 2020, there were 57 shark attacks around the world. Each year, about ten of these attacks are fatal. Even when attacks don’t result in death, they can leave victims with permanent health issues or loss of limbs.
There are also certain species of sharks that are known to be aggressive and attack humans when unprovoked, namely great white sharks and bull sharks. The latter has a habit of going into rivers, which is truly horrifying.