It was probably a bad luck thing matey,
Haven't seen a 22 RTR but wouldn't have thought that Losi would use different cheaper parts, may have been a weak part, all manuacturers get the odd poor moulding or defect... its the nature of plastic manufacturing and all r/c cars have parts made out of house and get quality issues.
I've had some high speed cartwheels and impacts where i've been taken out or got an obstacle wrong and have been surprised that the car is still in one piece and can carry on!
If you are bashing with it you may want to consider titanium turnbuckles as the 22 standard ones can bend in hard impacts but overall its a strong bit of kit.
Traxxas cars are built like proper tanks, bounce off most things without breaking and incredibly strong but what you get in durability you lose in performance as the 22 would out handle any traxxas car head to head in racing
If you need any help with the 22 just give us a shout, plenty of good sound knowledge on here.