He deserved more than he was getting. More praise, more glory, and more honor.
His brother was just happy to accept his role and do his best to lift those around him, even though his path was much, much harder.
The discontented brother could absolutely not understand or handle that attitude and turned all his efforts and the efforts of those who followed him to fight against anything the humble brother worked towards.
I think we can choose our path, but keep a keen eye on the direction it's taking you.