For People Wanting a Better Understanding of the Pros & Cons for both God-King Garen and Darius...
...I very highly recommend playing or researching the Shin Megami Tensei video game series (the ORIGINAL main series, not Persona or Devil Survivor). The conflict between Law and Chaos in those games perfectly represent the ideologies of God-King Garen and Darius, and how neither of them are truly good or better than the other in the long run.
Garen is YHWH, representing Law. He offers the safety of community and order, where everything has its place in a perfect structured system. When taken to extremes, however, this leads to a totalitarian society where there is very little individuality and free will.
Darius is Lucifer, representing Chaos. He offers unbound freedom and opportunity for all, free from the limiting shackles of laws and governments. When taken to extremes, however, this leads to total anarchy where safety is never guaranteed, always having to look over your shoulder in case someone wants to take your power for their own.
In short, neither side is good or evil. Both have their merits, as well as their flaws. Simply choose the side that appeals more to you, but please don't paint a misinformed picture of one side having the moral high ground over the other.