As most of us will tell you, we are our own worst critics.
That is a pretty block and I love your fabric choices. The corners of your blocks aren't perfect, that's true, but they are well done for a beginner. My half square triangles were so far off in my early quilts that I put one of them away for about 8 years before I worked up the courage to try to fix it. It's as fixed as it's ever going to be, and even though I could have quilted it myself, I asked a friend who quilts for $ to do it. It's much better looking than I ever thought it would be.
Yours will be, too!
As most of us will tell you, we are our own worst critics.