Poor quality image after file reduction

Hello and help!
I'm trying to reduce this image down to a width of 1080 pixels. However no matter which way i try in Photoshop 'Image size' the end result is a low res poor quality image with no detail especially on the beer label, sand and black cape. At the original size of 5472 pixels at 300dpi everything is sharp. What am I doing wrong or is this the net result of reducing from a large number of pixels to a lot less.
Any suggestions greatly appreciated.
Regards
Carl
