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.
Load-bearing whitespace like Python, yeah, absolutely. We can't take a language seriously when the primary cause of incompatibility is literally unprintable.
But indent your damn code. It's universal for a reason. If the text exists to be read by humans, format it for how humans think.