U.A's are my favorite deck of all time. But let's be honest, U.A's are 2 or 3 powerful cards away from being somewhat competitive. They have Omni Negates, Disruption, and the Power to hang with some decks. They just lack consistency and a Boss Monster. Hopefully the version I have made will fix that. By using U.A Signing Deal and U.A Hyper Stadium, you can easily flood the field with 2 or move Level 5 warrior monster to summon Idaten. By using Ultra Poly, not only can the summon not be negated, you can also special summon the monsters used for the summon back to your field. Their effects are negated but U.A's gimmick is swapping other U.A's out and special summoning others U.A's. Essentially, all you need to do is tag them out and tag them back in with their effects active.
The version I have made is budget, so obviously you can swap out cheaper cards with more expensive if you are willing to invest which would make the deck even more powerful. Overall, I hope you Enjoy!