Yep, pretty naff aren't they?
I took my strop line off. From memory you have to pull the loop apart and then thread it all the way down the handle and off. Then do the same for the other handle.
As for the kite killers. I attach mine to the loops with small carabiners.
Ditch em and get some flexi handles. Much more comfy.
Just my 2 pence worth mate. Good luck!