he did nothing to save her honour at that time,neither did he kill anyone of those people at sabha ,on the contrary he put his wife in a position where anybody could do anything with her (it was just lord krishna's grace that she was saved) and on top of it after knowing about karna he cursed whole women gender? i mean where was he mahaan only not for cheating?
and after all these stuffs he went to heaven he was considered dharmaraj i mean come on he did not face any consequences of the sin he had committed
arjun died because he had attitude for his archery,
bheem-for attitude for strength ,
nakul-for attitude for looks,
sahdev-i don't know much but still maybe attitude for astrology i really don't know that
and draupadi- for attitude for her beauty and loving arjun more (as stated by yudhishthir) so does he mean that she should still love him after all what happened?(oh puhleeezz!)
well coming to my point i really want to know why did he go to heaven if anybody can explain please explain ...