You can tell the kind of lives people lead that they would call Zenos 1-dimensional or cardboard.
Being raised by yourself, mother dies and father completely neglects you, while at the same time you are trained to be a tool of an imperial war machine. Every moment completely empty because you have never learned to or have understood what being happy was. Then finally finding that one single thing that makes you feel alive and human again.
Zenos is a story of someone who had a completely hollow and empty existence. Discovering meaning in life. Having to understand others eventually in their own quest to have meaning. It isnt really a story of redemption or combatsexual but a story of a hollow person trying to fill that void. He even goes so far as to come rescue you just to get you to acknowledge him. Deem him worthy of your attention. Which is all he wants. What he never had his entire life. The attention or someone equal or greater than him.
Most the people talking poorly about him and his story are likely people staring down from their ivory towers.