Think of all the people the Avengers killed
Plummeting to their deaths when Hulk snapped his fingers. We are talking about hundreds of thousands of people who disappeared while flying now reappearing in midair without a plane around them. At any given time ,on average, more than half a million people are in the air, even if a quarter of them disappeared..that is more than a 100,000 people falling from the skies
And let's not forget the people who disappeared from boats and ships and worst of all, submarines...suddenly appearing half a mile under the water ..
The people traveling on land would fare much better but still plenty of casualties when they suddenly appear in the middle of motorways and highways. Also would the people appear moving at the same velocity as when they disappeared ? Even more deaths when people travelling on trains for example, appear suddenly going a 100 miles an hour and hit the train tracks minus the train....
Yessir, any way you look at it, Thanos didn't make the people suffer, they turned to dust and disappeared. While Tony and gang responsible for millions of painful and excruciating deaths