As someone who has engaged in far too many CRP duels on this server, I'll give you my two cents. Most CRP fights that you'll take on the server will never end up how you expect them to. You'll often find yourself disagreeing with attacks your opponents make or defensive maneuvers they take. In this case, I think you'll find it useful to reach out to them in the OOC chat or through /msg and politely ask them to further explain their move. If they don't convince you, I'd suggest trying to find a middle ground and if not that, asking a server moderator what they think.
I know you currently feel discouraged about the CRP system, but it is a part of the game. Undoubtably, your first experience seemed horrible but I'm sure you'll eventually run into other players who just want to create a prestigious narrative and will be much more amenable in combat. Don't let this one experience ruin one of the most exciting elements of the server for you.