This is my improved rendom yugioh deck?

Well no one knows how to use a deck as well as it's owner. If it works for you, keep it be...if you want some improvement, go with a theme. I had a deck like this as well and it worked for me until I went up against more advanced players. It is not my place to judge decks :P I recommend themes, but not every successful duelist has used a theme for their deck. You can't really judge a deck until you have dueled it right? lol