You did the exact same by quoting my post and saying that Duel Commander is unfun and lacks diversity based on your thoughts of what commander should and should not be lol. DC is a casual format that happens to have a competitive scene, if it wouldn't be fun, people wouldn't be playing it.
You stated that you're playing Duel Commander in a competitive setting. I'm not doing the same thing as you in this regard -- tournament Commander, Duel or regular, simply isn't for me or and flies in the face of why I play the format.
However, I will cede I made the leap that ALL Duel Commander is competitive, so that's on me. I view the format as I do other constructed 1-on-1 formats -- ultra competitive and streamlined in terms of deck building. I suppose it stands to reason that there are causal Duel Commander players out there. But in the context of this conversation, you aren't one of them.
This is a bit of an oxymoron since Commander in essence is diverse because of the singleton and 100 card deck rules.
...what? I'm in favor diversity. The more decks and the more strange they are, the better. I don't want any streamlined net-decked builds on the EDH table. I want wacky and weird shit. A competitive format, even a 100-card list, is going to lack diversity when the builds are streamlined.