I really think you should talk to him before you 'report him'. Maybe the time of your lesson was restricted and therefore he did the pre-flight before. Also have you maybe thought that you didn't do very well when you were learning how to fly straight? And this was why he didn't want you to fly any more? Maybe he wanted to ease you into flying more complicated maneuveres. I think you're putting all the blame on the instructor when maybe you should be think about what you could do better. If you talk to him and he doesnt say there is anything wrong with your flying but still doesn't improve and let you do more complicated things then maybe you should talk to someone about it.