While I hate to see anyone give up quilting...I also don't believe in spending a great deal of time doing something you don't love.
Have you taken any classes? I sure learned a lot in my couple of classes that took a lot of frustration out of the mix. Quilt University has some fantastic online classes that can give you some of the shortcuts that make things easier.
Plus - leverage the experience on this board every chance you get. If something doesn't measure right - ask the experts. They were fantastic in helping me get to accurate half - square triangles.
What made you decide to get into it in the first place?