I think you are looking for a park board that isn't a complete noodle, a stiffer board will be much more stable at speed.
Gnu riders choice or lib TRS over the banana/pickle. They are similar flex but have hybrid cambers.
Another good one to check out is the Rossignol Jibsaw, it has magnetraction and is a medstiff park board despite having the word "Jib" in the name. it is mostly camber with little tiny bit of rockered tips.
Another really cool board is the YES trouble, not quite as popular but yes makes cool decks, has a milder magnetraction than mervin.
Dude, suckin at somethin' is just the first step to bein' sorta good at somethin'