Alright brother listen up, you gotta stop using those awful filters as your basis for making banners/sigs, what KBC does so well is making shapes that fit the compo, and overlaying textures. Use textures + blending modes more.
With the gayle one, it looks bad. FAR too chaotic in the backgorund, too shpar and colours dont fit, just too much going on, follow tutorials and when you follow them, ask yourself EVERY STEP what it adds to the sig, why you are doing it, and similar styles, this is the quickst way to improve, good luck mate