Mine is that the useState hook is an actual plague on the entire React ecosystem. Regardless of your opinions of React, if you wanna use something then use it right.
...which is why I love #[rustfmt::skip] so much! You can do stuff like
#[rustfmt::skip]
const DIRECTIONS: [[i8; 2]; 4] = [
[0, 1],
[-1, 0], [1, 0],
[0, -1],
]
while still enjoying the convenience of auto formatting elsewhere.
Although linters which act on the behavior of code are unequivocally a good thing, e.g. "hey, this comparison will always return false you probably made a mistake here".