General insults:
* Offended
* Humiliated
* Disparaged
* Derided
* Belittled
* Scorned
* Disrespected
* Abused
* Slighted
* Maligned
* Defamed
More specific insults:
* Ridiculed: Made fun of
* Contemptuously treated: Treated with disdain
* Mocked: Made the subject of mockery
* Snubbed: Ignored or rejected
* Condemned: Criticized severely
* Vilified: Slandered or defamed
The best synonym for "insulted" will depend on the specific situation and the level of offense involved.