Having gone through RGV's attitude, his satirical tweets and the substance of his films, it can be made out that RGV had developed a strong grudge on mega heroes and of course late Vangaveeti Ranga.
Firstly, let's talk about the reason for RGV's grudge on Vangaveeti. Those are the days when RGV was studying in Vijayawada. In spite of concentrating on education, RGV started teasing Siddhartha College's girls. The issue was brought to Vangaveeti.
Having gone Furious over RGV's foolish acts, Vangaveeti sent his loyalists to RGV. Despite saying sorry, RGV gave Bruce Lee poses to Vangaveeti's close aides. Resultantly, RGV was beaten black and blue by Vangaveeti's activists. Thus RGV developed a grudge on Vangaveeti from then.
Long back, Megastar Chiranjeevi and RGV worked for a film titled 'Vinalani Vundi'. After a couple of scenes and two songs shoot, Megastar understood tht there had been innumerable flaws in the script. As a result, the film was shelved. RGV developed hatred for Chiranjeevi from then.
A few more years later, Bollywood kicked out RGV which made to keep an eye on Telugu films again. He wanted to direct a film as Chiranjeevi as a hero. But then, Chiranjeevi said firm 'No', which further increased RGV's hatred on mega family growing by leaps and bounds.
And now, RGV is showing his grudge, jealousy and hatred on mega family through various gestures such as tweets, satirical films and hate filled statements.