You exposed your main weakness with this banner.
1- The text is bad.
2- You have weakness in making larger banners.
3- Blending.
So my advice, from now on, try always make large banners. Practice in this field for now and forget about the tiny signatures.
You will become better with more practice with bigger scales.
I advice you to try 500x220 sizes. See how can you fill the empty spaces, do all the gfx tricks and stuff. Is a good practice, go ahead and good luck dude.