That's not a man, and judging by the cover isn't always good, either. It depends on the situation.
You can tell a bit about someone from their face but you're not getting the whole picture. And it's only your interpretation of the messages that their body language sends. It doesn't necessarily reflect who the person is.
If someone is an all-around lowlife like the person in the image you cherry picked, then that's one thing. But with ordinary people, it doesn't say much on its own. You need to consider other factors.
The only exception is for immutable features like phenotype. You can tell jew from gentile this way, or get an idea of their ethnic background, but that's not always accurate either.
Take this actor for example:
https://www.youtube.com/watch?v=i50-Rr6ZgHQ
His resting face seems a little unsettling. But that's just judging by the cover. It doesn't give any insight as to who he actually is or what he's thinking and it's affected his image negatively in the past, all because he "lost the genetic lottery" (and he jokes about this in the video). Whereas if you didn't run away but stuck around him long enough to get acquainted, you'd know that it was just his resting face and he didn't mean anything by it. You might even like him enough to befriend him.
Alot of people, when their facial muscles are relaxed, give off a mean or sad or tired expression. That doesn't mean that they are genuinely mean or any of those things. They may not even be aware of how they come across.
Another thing that people can unknowingly do that sends inaccurate messages is if someone has poor eyesight so they're squinting all the time. Again, someone might interpret their face as them being disgusted, or mean, depending on the observer and the structure of the person's face. But does that mean it's true?
Or that person could be suffering from alot of pain, from their inner world or personal life. And that pain radiates outward and unconsciously gets reflected in their body language. Does them being in pain, and showing signs in their face that they're in pain, mean that they're terrible people?
Maybe someone pushing past their outer appearance and sharing a connection with them is just what they need to get through another day in one piece.
Again, you need to consider the bigger picture. People aren't always bad, nor are they always good, based on the image that they present. Many toxic & manipulative people seem charming and good at first, but it's a trick to lure you into their web.
If a person is truly predatory, they'd make sure not to give any signals that would tip you off, until they get you where they want you. A lion stalking his prey on the savannah wouldn't want his prey to know he's being hunted.
For better or worse, sometimes your impressions are right, sometimes they're not. It just takes awareness. Personally, I think it's commendable that OP's willing to look past the surface. Just don't ignore your intuitions entirely.
