It all depends on what track you race on, indoors I have broke 2/3 in one night before. Only broke one outdoor trying to clear a load of jumps.
There is defiantly a issue with the bottom kick piece, as I've seen then brake just landing off jumps.
Lee try adding some fibre tape along the bottom of the kick piece, one thing I noticed is indoor with running the car lower the front actually rubs more causing wear on the kick up making it thinner. Obviously if you clout something it will still brake.
Worth a try......or stop hitting things