But we are bombarded with commercials every day, that want's us to wish for things we don't have. It is a foundation of our society.
Also rich people have more power than poor, even in democracies. And if there is too wide a gap between people in a society, they have fewer common goals.
Yeah, because the folks making the advertisements aren't wasting energy wishing for things they don't have, they're going out and putting themselves in a position where they can buy those things if they want.
And yes, instead you could help and network with people instead of being an asshole. Usually if set up right, both sides benefit. Though it's not easy to do so right at all times.
You seem to have missed the part "make your own life better, in any way you can."
Envy is a worthless emotion. Spend the energy on yourself.