The image in my media library is 560×315, but when I inspect the image this is the code I find. srcset images are being loaded instead of my full resolution image.

<img src="https://domain.com/feat-image-150x84.png" class="alignleft post-image" alt="Return of Medicare OEP" 
srcset="https://domain.com/feat-image-150x84.png 150w, 
https://domain.com/feat-image-300x169.png 300w, 
https://domain.com/feat-image.png 560w" sizes="(max-width: 150px) 100vw, 150px">

Despite their names (300x169.png) all of the srcset images are only 150x84.

I've tried:

• Turning off any plugins that affect images
• Changing the image sizes in Settings > Media
• Regenerated every image a multiple times
• I tried adding set_post_thumbnail_size(560, 315); to my functions.php file as someone suggested. That did make the images display in the correct dimensions, but not the correct resolution.

I even removed the srcset image links. I was hoping if I did than it would default to the full resolution.

return false;
}
add_filter( 'wp_calculate_image_srcset', 'wdo_disable_srcset' );```

but that just made it worse.

How do I make WordPress use the full resolution image I uploaded?