No strategies are perfect as they said. They are all subject for success and losses as well. But how you handle your strategies create its difference. If you find yourself consistently learning in developing your own strategy and master it, that will be your edge towards the market. And definitely, your experience will tell it all if your strategy is worth to keep or need to be replace. However, its not just a good strategy that will make you a successful trader, your right attitude towards losses matters too. Losing will always be a part of trading, so embrace it instead and learn from them.
Trading strategies should be more flexible in a way that you can change it easily depends on the market situation. Strategies are not perfect at all buy once you have this you can expect to have a more profitable trades since you are doin this on a more responsible and discipline way. Learning should not stop from one strategy only, create more as much as possible and adopt what works for you, losing is very normal.