Volumes 1 through 3
Ruby interferes in a robbery and nearly died for it had Glynda not been there.
Instead of a proper punishment for it she's invited to Beacon
Once she passes the test she's made team leader despite being a novice, inexperienced in leadership and being the youngest
Thanks to the previous two actions she has a big head and directs her team into breaking rules to go on missions they want to be on despite their lack of experience
Thanks to her poor leadership she nearly lost her team because she couldn't stop their infighitng
Come volume 2 her team is renouned throughout the entire school as the rule breakers and destructive huntresses in training
Theyre actually somewhat proud of that
They conspire to break the rules yet again
Honestly thanks to grooming and nepotism Ruby has become Ozpin lite and all the adults with the sole exception of Glynda reinforced this bad behavior and thought process and as such have created a self rightious little monster that refuses to stop on her path and think, it's like she can't understand anything but move forward my way. Ozpin letting her get away with shit, Qrow's drunken behavior making her think that's how an adult should act, Yang's bitchy behavior making her think that's the right way to behave, Taiyang negligence because she looks too much like her mother, Oobleck putting her on a high horse compared to her totally selfish and self absorbed teammates, Ironwood comminding her reckless actions holy fuck they've created a monster, it's no wonder she's going to fuck up exactly like they all did, the adults around Ruby completely failed in developing her mind properly, she was still at that impressionable age,too
She learned all this from watching them including Ironwood's nasty habit of thinking he can't ever be wrong.