Surrounding oneself with people with good vibes makes a lot of difference

No it's not the case.

Here unhappiness is in the context that some people are never satisfied or focusing on positive aspects or are grateful for what they have.

They just keep complaining about or focusing on the problems.

And even if people help them, they either don't implement or don't change their behaviour to again get in similar troubles.

If the people who are in a genuinely unhappy phase then they should definitely be supported.

However one has to be happy first in order to help others who aren't happy.