I also had hell even with an Intel Macbook Pro. This whole just works thing Apple has been able to project is unfortunate. I have refused using Apple products from work because of how poorly their products integrate. It's not Dell. It's Apple. Any other monitor manufacturer will have the same issues.
Apple also refuses to implement a protocol that allows controlling the brightness and volume of a non-Apple monitor from the keyboard or even macOS itself. It's infuriating. The only monitors it works with are Apple's and the two overpriced Apple-sanctioned LG monitors sold in the Apple Store.
Apple also refuses to implement a protocol that allows controlling the brightness and volume of a non-Apple monitor from the keyboard or even macOS itself. It's infuriating. The only monitors it works with are Apple's and the two overpriced Apple-sanctioned LG monitors sold in the Apple Store.