I share your uncanny ability to break every alu boom, some didn't even last 2 months. Furthermore I've gone through 3-4 harness hooks, lines (harness seats too) in 1 season. DRAM and technora boards don't seam to fall apart. narrow wood boards (<= ~ 64cm) neither. Any wide and light board (like for slamon/formula) that is made out of wood or carbon is bound to fall apart. Wood cracks a bit earlier, carbon a bit later, carbon is easier to repair.
And yes slalom boards are designed for a very narrow application: fast & furious till the end of the race no matter what. You just might need a couple of them to compete a full season