Poor display, inefficient GPU. It's the least expensive 15-inch Latitude available and so cut corners are not unexpected. The number of drawbacks, however, may be a bit too much to bear. Find out what you'd be sacrificing when purchasing the Latitude 3590 instead of the pricier Latitude 5590.
https://www.notebookcheck.net/Dell-Latitude-15-3590-i7-8550U-Radeon-530-Laptop-Review.331638.0.html