My first sailing experiences with the i14T were similar, but after reading through a lot of posts I decided to try a few modifications.
First things first, you're going to need to install the sail rudder ($25) to get the boat to respond. Turbo fins are a bigger investment but well worth it. They'll make a huge difference especially when soloing, and they'll get your boat to point.
I was bit by the sailing bug too and rigged a furling jib. The boat now points into the wind and performs great with or without passengers.
Don't sell the boat short; I've been having a lot of fun with it. I agree with you, the sail kit out of the box is anything but awe inspiring, but the addition of the rudder, fins and jib really pulled it all together.
Check it out….. viewtopic.php?f=32&t=12144