Apart from that, he is very well aware about Sushim's anger and attitude problem. He himself asked chanakya to guide his children as he did for his father and him.
But all of sudden, when Sushim won, bindusar announced Sushim as his successor and was so happy that he didnt even gave chance to Chanakya.
But luckily Chanakya intervened on the right time and stopped this ceremony.Now hope Bindusar doesnt think of making Sushim his successor again.