As of right now, we don't have any information about whether or not Randy's Throwing Knife will still be good in 2022. However, we can make some educated guesses based on the current state of the game.
Right now, Randy's Throwing Knife is a decent option for mid-game play. It does a decent amount of damage and has a relatively fast throwing speed. However, it is outclassed by other weapons in the late game, such as the Shuriken and the Kunai.
It's possible that Randy's Throwing Knife could see some buffs in the future that would make it more viable in late-game situations. Alternatively, it could be nerfed to the point where it is only useful in very specific circumstances. Only time will tell what happens to this weapon in 2022 and beyond.