Finished watching Karuppu, and I think Trisha was justified in saying this
She was the main female lead and quite possibly had the most screentime alongside Suriya and RJB. Ignoring the other controversies that surround her, I think she wasn't wrong to send this quip.
Imagine acting in a movie where you are one of the leads and are simply ignored when it comes to marketing the film. She was however seen at the premier alongside RJB when he was going all sigma wolf so doubt there's any bad blood between them.