It's not the worst, but for me, it is easily the most hated. It's a stupid thing to get hung up on, I know. For some reason my hands don't like to type colons, even though semicolons and shift keys alone are just fine. I just hate typing colons. Feels lazy to adopt a C++ construct when you are trying to produce something to replace C++, anyway.

There was an opportunity to choose something less C++-like but someone thought "I'm used to doing this because of C++, so I'll keep the double colon" and kept it around. Ok, that's fine, and I'm gonna keep talking trash about Rust, because I'm used to doing it because of C++.