But...if I'm remembering correctly, you said that if you process it only in Lightroom when you upload to web/social media the image looks ok? If that is the case, there has got to be something in Lightroom that is different from Photoshop. As I mentioned, I've never used Lightroom so I can't advise you where to look.
Have you tried uploading an image that you saved using the "Save for web"n option with the "Monitor Color" chosen? What does it look like?
Terrie