Would the world and people be better off without any religion?
What would be better?
What would be worse?
The world would be a better place if corruption and violence disappeared, if every person on earth had a decent place to live, food and water, access to healthcare and education.
Ending religion wouldn't solve any of those problems, so to answer your question, I don't think the world would be a better place without religion. One problem would be replaced with another. I wouldn't call that an upgrade.
It is true that many religions have been a source of trouble over the years, but at the core, it's always been about a bunch of people using others to get more power and money. Remove religion and you'll be left with other organizations - political, financial - also fighting for power and money.