Different individuals engage in different method of trading. You can have same strategy, but different approach. Doing something wrong in trades, defines the strategy you are using and how you are applying such strategy. First, identify what you are doing wrong, then go about correcting it.
Identifying one's mistake is very important and we need also feedback from the other people in order to make it right. But seeing how OP's express his losses, it probably he really doesn't have enough knowledge in trading and experience. It is a common thing to lose but we need to interact also and find a way to minimize our losses. Yes, strategy could be a big factor and that is he needs to acquire to have a better and profitable trading.