The issue I see here is that you're taking your particular WoL as THE WoL. Zenos may be a reflection of your WoL but the WoL as presented in the game is a blank slate character. Everyone's WoL has the potential to be completely different in their feelings and motivations, which is why a defined "mirror character" doesn't work really work.

I don't think anyone is saying that Zenos doesn't have a background that leads him into being the character he ended up as. The problem is that the story as written basically stopped doing anything with him when he died the first time. Everything that happened after that point involving him could have easily been written to be done by someone else, and Zenos himself was just shown to be sitting bored on a throne almost all of the time (when he wasn't barely hiding a hate boner for the WoL). The potential for Zenos to be an interesting character was maybe there but the Zenos we actually saw and interacted with in the game itself, well, wasn't. In fact, we had better both "crazy evil" and "scary physical presence" characters running along side Zenos which actually made his blah presence even more blah.