Sorry you're having problems! How frustrating!!
I agree with Swedishfish. I think one of the biggest issues of people not continuing is due to the fact that it is not as simple as pulling a smoke from the pack and then lighting it. It does take time and effort to get to the point where you are reasonably happy, whether that be hardware, juice or a combination. I have only been going for about 2 1/2 months now and am still yet to find my juice nirvana, which I am sure is out there, so just have to keep on looking.
As SF suggested, try the Boge carto's or even direct dripping and see how that goes for you. Neither is a convenient as the tank system but may be worth trying to see what you think of the difference. Personally it didn't work well for me ( wicking issues due to my VG juice) but my wife is fine with it (100% PG juice) as it wicks well for her, although no matter what the flavour she can't taste anything anyway