I do believe in intuition especially when it comes to people and the way how I feel about them. But I totally get your point. If we fail at something, we tend to create this false belief that we aren't good. And we carry this belief for years. Many things are a matter of practice where we have to try many times before we are successful. In my opinion, one of the important thing when it comes to success is commitment and perseverance. The most extraordinary things take time, lots of time. If we can be patient and consistent in our actions, success is only a matter of time.