Thanks for giving my game a try!
The meter is just for reference the player actually will rage quit based on RNG, the higher the rage meter, the higher rate the player will quit.
My thinking is that the player won't have a fixed value to quit a game. (Just like when you light the path the player is not necessary to go there, but have higher chance to go there)
Maybe I should try to communicate it better in the opening dialogue.
However, in my many testing, player rage quit when the bar is low just once or twice, which is in my opinion, an acceptable range.