Brisket Disaster

Well I've attempted my first packer brisket on the Yoder and other than the burnt ends it sucked.
Pre-trimmed weight was 13.5 lbs.
Separated the point and flat and removed excess fat
Applied rub
Into the Yoder at 250
At 5 hour mark both were at 165. Wrapped the flat in peach paper and put the point in a pan with beef broth.
Monitored temp until they hit 200 which was at close to the 12 hour mark
At 210 put the Flat in a cooler to rest for an hour
Came out like damn cardboard
Point was delicious
Any guidance is greatly appreciated
Pre-trimmed weight was 13.5 lbs.
Separated the point and flat and removed excess fat
Applied rub
Into the Yoder at 250
At 5 hour mark both were at 165. Wrapped the flat in peach paper and put the point in a pan with beef broth.
Monitored temp until they hit 200 which was at close to the 12 hour mark
At 210 put the Flat in a cooler to rest for an hour
Came out like damn cardboard
Point was delicious
Any guidance is greatly appreciated