Really - 6 months and you're discouraged? It definitely takes longer than that to really get good. Do you happen to play a musical instrument? How long should it take someone to get good at playing the guitar? Sorry if this sounds too critical - but come on! Think of someone playing guitar for 6 months and entering the local talent contest - and then being upset that they didn't win anything. Have some tenacity - and it's a lot more fun "practicing" pinball as a beginner than it is practicing a musical instrument (when you're not very good that is).

BTW - it is just like practicing an instrument - the more you practice, the better you'll get -> don't be so impatient.