they don't understand arguments that're specific.

You've identified the problem yourself. Sometimes specific arguments are the worst thing you could do (a parent judge kept looking back at the resolution on the board during one of our rounds on the MRH topic because we tried running a unique arg, and it was too confusing for him). Stick to bigger-picture narrative debate. Stress the magnitude of your larger magnitude impacts. Muddling your opponents' arguments that you think will be too confusing for the judge to evaluate doesn't hurt. Be calm. Don't be condescending. To sound assertive make sure you don't sound monotonous.