It is hard for me to admit it but in Avengers: Endgame, Captain America indirectly implied that the planet is much better off. At first, it is devastating to lose your loved ones. The world grinds to a halt. There is a lot of sadness in the air. Over the years, people manage to heal. We see some people happier than they were before the snap. We see a lot of plants and animal life. This means that Thanos was right even-though what his decision was very cruel.