your typography is weak, you should look to leave it out or try copy styles from high quality sigs
definitely work on color and tone, a lot have too much contrast and the colors seem to have little thought behind them
try to tone down the chaos, it seems like a lot of the effects are just thrown in without thought to composition
try to plan out in your head what you want the end to look like, or even sketch it, and be mindful when you do something that doesn't fit it
following good tutorials can help you a lot more than cnc will at this point but if you have 1 sig in particular that you think is your best (not one of these) you can pm me for more cnc