Unicode is vast. There's absolutely no good reason we don't have Snowman Separated Values (or some other proper separator sign that isn't commonly used elsewhere) other than that people don't demand it.
0x1C FS File Separator
0x1D GS Group Separator
0x1E RS Record Separator
0x1F US Unit Separator
You just need a font with glyphs for them.https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
\ is AltGr+?
] is AltGr+9
^ is Shift+^, then space
_ is Shift+-
AltGr is the right Alt key, to the right of the space bar.So none of those are single keys, which means that combining them with Ctrl to write control characters becomes almost comically difficult. Not very accessible to typical users, I'd say.