I want to be able to speedrun crashing Garry's Mod it will be easy because my pc is trash

It already has a leaderboard, so no need to request it. You should make a post in that game’s forum requesting a new category.

I swear, nobody reads posts before they respond anymore

A bit surprised no one has said this, but crashing the game sounds like a pretty bad category, and depends on the speed of the users’ PC.