Bottom Turning? Help

I can ride down the line on a longboard. But shortboards I just go straight down the face of the wave and either wipeout or lose all speed on whitewater. Its like I dont have time to turn and when I do i am just exiting the wave losing speed. Am I too big for my board its a dumpster diver 6'0 and im 5'11 170 lbs.
Im out there everyday with no progress on this, so I resort to posting this
Btw im from jersey. 1-5 ft waves
Help please
Im out there everyday with no progress on this, so I resort to posting this
Btw im from jersey. 1-5 ft waves
Help please