New HUD will take time to get used to.
Stop complaining on day one and give it a try. There are elements that could have been done better. (Personally I dislike the fact that everything that isn't available is completely grey instead of just darkened/dulled.) But you can't ignore the many improvements that this update brings. Centralization is actually something I wanted for a long time. Being able to see the cooldown of both your items, abilities and spells in just a blink of an eye is amazing. You no longer need to look to the bottom left side to view your items, something that EVERYONE will still be doing for atleast the next 10 games, but slowly you'll adapt and learn to appreciate the benefits of this new HUD.
The main reason why the HUD looks so weird is because it's new. Give it time. It'll become second nature to you, just like the old one was. No one can argue that cooldown on allied ults/summoners is a great feature and so is seeing enemy death timers without pressing TAB.