You can check your theme’s functions.php file, line number 46 which is
add_image_size( ‘thumb-featured’, 250, 175, true ),
so any image uploaded which is greater than 250 width and and 175px height will be cropped to this size. So add/edit the size you want it to be and save it and apply accordingly.
To read more on add_image_size, check the codex.
Once this is done, regenerate all the images using this plugin to make this image size work.
Now too remove the comment-counter, add the below css in your child theme’s style.css or using a custom css plugin.
Hope it helps!!