I don’t want to sound as if I were a Fujifilm advert, but seriously, I am always baffled by these kinds of posts. I have just come from a lunch with an experienced photog who shoots the Nikon D850. He wanted to see two big printed photobooks that I made, one of Edinburgh and another one of the Alps & Dolomites, 160 pages each, bigger than an A4 paper. He went through them very slowly and he repeatedly praised the pictures for sharpness, handheld low light shots, high dynamic range shots, colour etc. He said they were very very good, worthy of commercial printing. He was genuinely surprised what the Fuji cameras can do. My X-T5 & X-T2, no issues whatsoever. I love these cameras. I could buy anything else, I have the money, but I honestly see no reason. Maybe if I were a sports photographer shooting indoor basketball I would need something else, but for anything other than that, no. Size, handling, quality, colour, dynamic range of the sensor, wonderful lens - I love my Fujis. Focusing on the X-T5 is of course faster than on the X-T2 but I am keeping that one too. Focusing was never an issue for me. Sorry, I have a different experience.
Might you have a faulty camera ? I don’t know.