Interesting, I find rust is pretty dense, but mostly in a good way. It packs a lot of important information into the code, which is useful for reasoning about it. Languages with simpler syntax tend to hide that information (and sometimes because it's irrelevant due to the kind of tradeoffs they make, like all the languages you mention have some form of GC). Haskell I would say is especially hard for me to read, when there's so little syntax the code is just a sequence of functions and symbols without obvious delimiters it becomes a lot harder for me to understand the structure of it.