Featured Image on pages: mobile looks good, desktop image darker and cropped

I have a different featured image on each of my pages and when I view the site on mobile everything appears perfect (iphone X) when I look on my desktop browser (Chrome/IE) image doesnt adjust to width and crops off portion of bottom, it also appears to have dark overlay. Ignore the Home page everything appears to be in working there. Link to site below, any help appreciated chainblockinc.com thanks, J