If you want to throw something that's actually meant to be thrown, like frag grenades, molotov cocktails, and throwing knives ...

By now, it's beating a dead horse saying that Penetrator Augment 'crit' throwing knives are overpowered in Borderlands 4.

Kickballer can be farmed by defeating a specific boss, just like most other legendaries in Borderlands 4, so it's pretty easy to get. You can start farming for Kickballer quite early in the game, too.