Consistency, ball placement, strategy

In matches, I find myself playing a mindless, aggressive, third-ball attacking game. I try to finish off points as quick as possible by attacking any possible balls. I think there is little ball placement and strategy involved in my game. 

The reason for this is that I am not very consistent during matches; I am unable to keep up in slightly longer rallies, and fall to my opponent's consistency, good ball placements and strategy(all of which I do not utilise much). 

Should I work on my ball placements, strategy and consistency? Or is my style of aggressive play acceptable? 

Also, I am a beginner, having only played table tennis for 2 years and received proper coaching for 7 months; So I do not play at a high level.