HUD Déjà Vu
Does anyone else remember way back some time around 2012/2013 when League updated its UI before? For some reason, I think I remember that happening. Not only that, but I seem to remember a lot of complaining about it very similar to now. Just a lot about how "wrong" the new version was, and how they may quit if they didn't get the old one back. However, after a while, people adjusted to the new version, and finally shut up. And no, Riot didn't keep both versions as an option to select back then, and they most likely won't now.
Please, at least give the new HUD a chance, and give yourself time to adjust. With such a large change, it takes practice to relearn the interface. After enough games, you probably won't notice a difference. And maybe, just maybe, you will end up liking this HUD more than the last. Eventually, you will barely remember the change... At least until the next time they redo it again in 2-3 years.
And if I'm wrong about there being a significant UI update way back when, please disregard these statements (except paragraph two, listen to that anyways). Perhaps I hallucinated the scenario? Perhaps not. The point stands, give the HUD a chance.