Its no help, but I know how you feel. Like bearisgray suggested, try some straight line quilting. But I can say probably no one is looking at it as close as you are. They probably honestly don't notice
What I have done is practiced on donation quilts. I know that sounds awful... you know donating what I don't like. But you have to learn somehow
I recently purchased a ruler foot for my sewing machine and a heart shaped ruler. And I am really really happy with how that is going.
Just today I got an order from amazon with another ruler ... I can't wait to try this one out.