I love making triangles with Thangles or other printed papers. Also, I never sew the bias triangles together. Put two blocks together, draw diagonal line corner to corner, draw 1/4" from that and sew. Then cut to make two half square triangle blocks. But your applique boggles my mind. I can't imagine the work that went into those wedding rings or the Twelve Days of Christmas. Wow. You are way too hard on yourself. Enjoy what you do well and practice what needs improvement. It's what we all do.