In general, I find Rust very readable. The areas I do find I struggle are generics and lifetimes, and I don't think it's a feature of Rust syntax that makes me struggle and is instead the fact that people tend to use non-descriptive names for lifetimes or generics. It's hard to pick apart a trait that has four generics name T, U, V, and W, or lifetimes 'a, 'b, and 'c.

Usually people will try to make it the first letter of something meaningful, but it is still much harder to parse.

My own preference is to use more descriptive names except in trivial cases. Having the lifetime mirror a struct member name or a parameter name is really helpful for understanding them, in my opinion.