Why did the Grinch hate who roast beast?

The Grinch hated the Who roast beast because it symbolized the joy and celebration of the Whos, whom he despised for their happiness and festive spirit. The roast beast was a centerpiece of their Christmas feast, representing everything he loathed about the holiday season. His disdain for the Whos' merriment fueled his desire to sabotage their celebrations, including their cherished meal. Ultimately, his hatred stemmed from his own loneliness and bitterness.