Stop trying to charge LiPolys with the Superbrain 969 IMMEDIATELY! That charger is under no circimstances suitable for charging LiPolys, no matter what it says on the box!!! They're expecting you to use a fixed-capacity charge with a PEAK DETECT! LiPolys don't peak, and you can't possibly know how many mAh you need to put into the LiPolys to charge them.

As far as your bad luck with components, without being able to observe you and your flying habits, there's no way to tell if you're doing something wrong, or you're just unlucky.

Some of the things you do NOT want to do:
1. Put a bigger prop on the airplane without checking here first.
2. Run the motor for extended periods of time on the ground. This tells you nothing, and only gets everything really hot.
3. Forget to shut the throttle down when you crash. This is a sure way to burn up motors.