If you are playing versus orc for example and using "strategy X" and you make a few wins and then 1 loss what does this tells you? It means that you either didn't play the strategy good enough or you need to change something, adapt to your opponent's strategy. When losing try understanding your style and understand your opponen'ts style of play.

Example1: you can play defensively and he can play offensivley. In this situation you have to know that he will harras you and you will have to make something about it, right? You can't just go and creep while he is attacking you. After you have chosen a strategy and you see your opponent's strategy you have to adapt to it.

Example2: if you have started with DH and archers versus an UD or ORC player on TR(close positions) and he places second crypt or barracks respectively, you can't pretend that nothing hapend, because in a number of minutes you will be outnumbered. Best thing to do is put second ancient of war and start pumping units.

You won't win any good players if you play like a robot. Most important thing is to adapt. After that you can start making some more games and see how it goes.