You're going to have to be a little more specific on what the bendy bits are.
Did you follow the Instructions provided for building your car. ie Did you use the measurements for the turnbuckle lengths as provided in the Instructions?? Also were you sure to use the correct holes for shock positions etc. The best thing to do is go back over the Instructions and make sure everything is as the Instructions suggested. Also Check that your shocks are built correctly with no air bubbles etc.
I am only suggesting these things because I am not aware of your kit building abilities.
I have built 3 X TA04R Chassis and even when setup as per the Instructions I have found them to handle quite well.
Double check everything and see how you go..