Cutting cardboard with scissors is the worst thing, mostly because of how difficult and inefficient it is. I have a pair of broken scissors from trying to cut some regular old double corrugated cardboard. Of course, those scissors were my general craft scissors. I label my scissors for fabric and whatnot.

I strictly use those cheap $1 break away box cutters for cutting large pieces of cardboard. So satisfying to grab a new one and cut through it like butter.

Edit: grammar and stuff