Problems with layout on mobile

I am having issues with the mobile view on 2 pages:

A) Page: https://33n.834.myftpupload.com/
1) The images on this page only show the center of the image on mobile (it is a very wide image)
2) When I click to show the whole image – the text is cut off.

B) https://33n.834.myftpupload.com/paintings-2/
On mobile – these rectangular images are smushed to fit in a square.

The page I need help with: [log in to see the link]