A rude person...

Una persona maleducata...

depends on your individual sense of what it means to be rude. But generally they are simply too self-interested.

doesn't care about others.

is inconsiderate and selfish.

is mean,
is too honest

is someone who willingly offends others without caring for their feelings.

is unruly

should never work in customer service.

will interject with their own thoughts and downplay another person's intelligence.

è irritante.

irrispettosa,cattiva educazione

non è una bella persona.

non rispetta gli altri

non saluta

spesso non ne ha colpa, non ha ricevuto un' educazione.