Are you running a lot of weight? My Epics have driven very differently when weighted, chine lock, cavitating, etc.
Look at your rudder to see if it's bent, or if it has been worked on. Look for grinder/file marks. Sometimes they are modified to make the boat drive straight with no preload, the preload is used to make the boat drive straighter through a slalom course. Just a thought.
My boats have turned easier right than left, due to prop rotation (LH) I have not experience chine lock unless I was heavily weighted, and it wasn't that bad, just noticeable.