I personally stopped using Facebook 10 years ago and will probably never come back. At the time when I used it I only used it to connect with friends and family

I personally stopped using Facebook 10 years ago and will probably never come back. At the time when I used it I only used it to connect with friends and family and I saw no disturbing content or content that would incite jealousy, greed or lust. I think the trend of hyper self-centric content begun with Instagram indeed. For example Photo Models and Body Builders sharing photos of their bodies for no apparent reason besides to glorify and/or sell themselves. Photos of food make no sense to me, photos of pets I can somehow understand and yes I can understand how looking at happy lives and happy experiences can make you feel miserable but then again Facebook or Instagram don't really know your mental health and state you are in and can not magically remove "sensitive" content that would disturb you. Best thing would be to stop using social media altogether or use it only to inform yourself about the world around you but in the form of text or perhaps audio/voice only.