The thread isn't about feeling good in your own skin. It's about aging, tretinoin and it's effects on the face.
Posting weird angled pics where you've tried to stretch out your neck and jaw so the sagging is as minimised as possible, whilst pulling a pout or trying to smile whilst pouting, then saying tretinoin is great because you don't have wrinkles... is messed up.
In terms of the thread and OPs concerns about sagging, Sonato may as well have taken her fingers and stretched out her skin pulling it towards her hairline very obviously then taken a pic and said she doesn't have wrinkles or sagging and it's all down to tretinoin. It's bullshit.
If she wanted to advertise it's effects on her skin she should have posted an ordinary full frontal face photo in ordinary lighting and without any major face expression going on ie no pouting, frowning or grinning. Then people can see her natural skin tone and sagging. And OP could, if it helps her, compare that pic to herself in the mirror and see what she thinks about any differences.
Sonato doesn't look 25, whoever said that is looking only at the pose and the no-obvious-wrinkles-at-first-glance aspects of the photo. When you look properly, it's very obvious she has sagging jowels, you can see it no matter how much she contorts her face to try to hide it. There's nothing wrong with her pic as a selfie on FB or Insta but this isn't a "post me a flattering selfie" thread. People are pissed off at her blatent attention seeking that adds nothing to the thread. She's always doing it. That's why they're jumping on her.
OP I'm not convinced myself that anti wrinkle and plumping things are the right way to go for anyone. If it's subtle I suppose it's ok but where people have the "best" effects they look weird IMO. Smooth skin like a 20+ on the face but without the natural facial volume of someone young, very obviously older neck, décolletage, hands, knees, feet. It makes them look odd, misplaced, as if they've been put together out of different pieces, like building a robot, instead of being one whole harmonious human where everything matches. I agree with 70isalimit people look better if they smile. If you're feeling down about yourself you're maybe not smiling at all and whilst someone young just looks moody if they don't smile, older people look saggy, especially if they're also tired. So the best anti aging IMO is being happy and getting enough rest/sleep.