Yes, there is the urge when one gets a wide aperture lens to open it wide every time all the time. When you have a hammer, everything looks like a nail. One should resist the urge and set the aperture to what makes sense for the subject. It looks to me like you got focus on the tip of one of the petals. It needs more. One other thing: if you look at your RBG histogram, you will see that your red channel is pegged all the way to the right. Your reds are, therefore, clipped, causing lost of detail. I sound like a broken record to myself when I keep saying this. But it keeps happening. When you have a dominating color in an image, you need to expose for it and forget what your meter tells you.