GA Pilot flying an approach at SOP non-towered airport reported being cut off in the traffic pattern by another aircraft and stated this type of operation is common at the airport and poses a safety hazard.

Narrative

I was flying Aircraft X; had flown locally for slightly over an hour. Set up for the GPS 5 into SOP on the Garmin; with the ILS/DME 5 in the #2 and SOP in the #2 GPS. There was Aircraft Y; doing touch and go landings flying extremely; extremely tight traffic; landing about once every one and a half minutes. There was no other traffic in the pattern.I intercepted the GPS 5 about 11 miles from the airport; called a 'Moore County traffic; Aircraft X on a 10 mile final GPS 5; full stop landing; Moore County'. I repeated this call at 5 miles. Aircraft Y called turning downwind. Momentarily thereafter I repeated my position report at 2 miles. Aircraft Y immediately called turning base. I immediately transmitted 'Aircraft X on less than a 2 mile final'. Aircraft Y responded 'lots of room' and cut me off; maybe 1;500 feet in front of me. I was flying my approach profile at 120MPH; 105K; so I pulled the throttle to idle; applied full flaps. The distance decreased to about 1;000 feet. I was about to initiate a go-around but Aircraft Y landed and immediately took off again and I was so low and slow that I thought it safer to continue with the landing. I have no idea who was flying Aircraft Y or riding as a passenger.Dangerous non-towered operations are common at SOP and I have so previously reported and something needs to be done before someone gets killed. The airport manager could care less about this kind of behavior and the airport authority is clueless.