Your board is fine. I know plenty of guys that used to rip that board (John Dreiling, Matty Hasler, Lior Sofer)
Just go to the cable more and your riding and timing and pop and whatever else will get better.
People are doing 720s on wakeskates these days, so it would be really hard for any modern board to hold you back much.
Lots of time and practice is what will help you improve. Get out there