I fell into this trap. Now I own a very bad Dell monitor. :(
Unfortunately, you must select carefully any monitor that you purchase, and the cheapest models are unlikely to be good choices.
I am using 2 good Dell 4k monitors. One is 1-year old (U2720Q), but the other (UP2414Q) is more than 5-year old and it works as well as in the first day.
I say this because it's unwise to hear that Dell has pretty good gear, then go to their site and buy the cheap stuff. It isn't necessarily any worse cheap stuff than anybody else, but it's not what people mean when they say Dell can have pretty good gear.