Outpointing most monohulls is a problem for a catamaran. The real culprit is the speed
. The faster you go the more the apparent wind will come to the front of the boat. To get the sails working they have to see an angle to the wind. As that angle gets too far forward you will have to turn the boat a bit off wind to keep the same wind angle to the sail. The faster you go the more you will be effected by apparent wind...This is a good thing!
Try driving a Trifoiler at 40 MPH while measuring tacking angles, they are bad, but the boat is really fast. Greg Ketterman proved that it can sail upwind as fast as a catamaran, I think it was a Prindle 19, sailed by some of the best. That is, getting to the weather mark not pointing with them. It seems like there is no downwind on a trifoiler as you will always keep the sail sheeted to center. Speed is the rush!