Depends on the person
I’m a Leo and if I have a problem with someone I’ll tell them, I’m not a backstabber and would never go behind someone’s back or intentionally cause **** for them, but... I know a Leo guy (an ex friend) he’s nothing more than a backstabbing little snake, he’d actually throw his kids under a bus to save himself or get what he wants.
Capricorn - natural deceiver
Scorpio - likes to make you look bad to other people
Gemini - two faced af
Libra - because they like to know everyone’s business
Sagittarius - for some reason they like gaining information about people to use against them when convenient