Been there, in fact, the other day I was cutting up 9 patches for an EB pattern and instead of cutting a straight line (even though I had a cutting edge) I went off to the left into the block. Luckily, it turns out I didn't need that block, so it will go into the scrap bag.
In another case, it took me 5 tries to finish sewing the binding ends on a small quilt. Every time I thought I had it, it turned out I had sewn it either backwards (facing the wrong direction), hadn't measured the length correctly (too long, then too short), or twisted. It took me 3 days of trying, I would try it twice each time and then decide I better find something else to do rather than get more frustrated. I had another binding that it took 2 tries. For some reason I was having trouble finishing bindings that week.
It did get better.