Don't quit.. :) the more you do the better you get, may want to do easier patterns for a while that look just as good, so many pretty ones out there that nave no triangles so you don't need to worry w/bias stretch, sounds like tuts to help (yay) When one or 2 go great and are pleasing to you, gives reason to try more or practice techniques that are tough on small projects, that way if you toss them not such a big investment.
Don't think will ever stop completely, but have taken breaks and at other times lack of time or life gets in the way. :)
Hang in There !!