That is an opinion framed as a fact. There's plenty to rub a coder the wrong way, such as the sigil in builtin functions like @import, the dot syntax in structures (.{}, Timestamp{ .seconds = 0, .nanos = 0, };), triple slash comments (///), and multiline strings (beginning each with \\ - good luck grepping for escaped backslashes). However, that is just like any programming language - none is immune to this criticism.
the triple slash is only for doc comments, not normal code comments - those are still double slashes. also, why would you want to grep for escaped backslashes?