I stopped drinking soda regularly decades ago and went through the same thing, drinks I once enjoyed were now either “meh” or way too sweet and acidic to be able stomach more than a few ounces. Cutting out soda also meant cutting out a lot of artificial sweeteners (because I was never very picky about diet or not, I just wanted the bubbly sweet. That meant that when I did try diet sodas after having quit for some time, they tasted even worse or sometimes even made me feel worse. This is all anecdotal obviously, but it seems like you’re experiencing something similar. It’s not just you. There’s nothing wrong with you.