His upbringing had forged him into a formidable warrior, but it had also left him with a cynical view of existence.
The clash of ideologies and power could only lead to one outcome– a battle of epic proportions. Ryder didn't want that to happen, but he didn't want to get involved either, since that was only going to make things worse.
That's why, he stayed away from everything related to the Realm of Gods, only focusing on his own World and his children, giving them the best teaching he could. Even when Janus came and asked for his help, asking Nyx to put forth a claim to the throne, Ryder refused.
He knew his own son and didn't want him to put his life on the line against his own brother. If Caen was an arrogant god who started from the top and considered everyone beneath him, then Nyx was the person who respected even the weakest, and started from the bottom.