Want to italicize some text? Easy right, just do it like *this*.. nope that will bake it BOLD, gotta write it like _this_ for italics.
https://support.google.com/chat/answer/7649118
The only thing I like is that you can colorize text, but there's no syntax for it, you gotta highlight it then choose a color in the formatting toolbar.
It's annoying to no end when you memorized the syntax and Google decides to not even follow it.