According to Thanos, he wanted to kill half of Titan's population randomly and dispassionately, with no distinction between rich or poor.
The Blip (also known as the Decimation and the Snap) is a major fictional event depicted in the Marvel Cinematic Universe franchise in which half of all living things in the universe, chosen at random, were exterminated by Thanos snapping his fingers while wearing the Infinity Gauntlet and wielding the Infinity Stones ...
His solution was simple, fair and brutal: He would kill half the population by random drawing. The rich and poor alike would be killed according to chance, and the rest of the population would have a chance to live in a world of plenty. The other Titans didn't go with his plan.
He believed that by eliminating half of all lifeforms, he would be able to bring balance to the Universe and stretch the limited resource, making them more lasting.
At the end of the movie, mega-villain Thanos snaps his fingers while wearing the Infinity Gauntlet—a magical metal glove bedazzled with six almighty stones—and wipes out half of the planet's population.
Another reason Thanos was wrong is the temporary nature of his solution. Since the population boom of the Industrial Revolution, when the human population reached its peak of 1 billion in 1804, it has only grown expontentially. At the time of Thanos's snap, Earth's population was 7.6 billion.
Thanos don't regret doing what he did at the End of Avengers: Infinity War. Just like Cap said: Thanos himself believes that he's saving the Universe, by destroying half of it. So, it doesn't matter who dies so long he achieves his goal.
A storyline in the title Captain Marvel showcases Thanos' scheme to conquer the universe, as the character becomes determined to prove his love for Death by destroying all life.
Increasing the amount of available resources wouldn't change things in his mind: it would only enable people to continue using them and wasting them just like they had before, thus increasing the lack of balance he thought to see in the universe.
In his quest to get closer to Death, Thanos once sacrificed himself in a moment that turned out to be his biggest failure and a colossal mistake. In The Thanos Imperative, the Mad Titan surrendered to Lord Mar-Vell and told the villain to kill him.
The Asgardian Son of Odin was extremely close to ending Thanos at the end of Avengers: Infinity War. After gaining the powerful weapon Stormbreaker, Thor becomes the wielder of the most powerful weapon in the universe. Stormbreaker is capable of killing Thanos outright, and only Thor is currently worthy of wielding it.
Imagine, Tony survived after End Game, he could have his own replicated Pym particles, had a time machine in his suit and even had access to each timeline in the multiverse. Dr. Strange believed if Tony Stark survived then sooner he will be the most powerful being in the universe.
He felt sad, after all he had to kill his own daughter. But not regret. The “Snap” has always been his goal. And now, he finally achieved it.
The cast played dumb at the time, but Marvel has an answer for that, too. For everyone who didn't get snapped away, life went on for them. More simply, they aged five years. For everyone who did get snapped away, time stopped for them.
In 2018, Jones was a victim of the Snap. Five years later, Jones was restored to life in the Blip.
Why was Captain Marvel not snapped? That's because she was pulling energy from the Stones to give her a power boost, which also explains why she didn't flinch when Thanos punched her.
Ultimately, however, the Ancient One could have theoretically stopped Thanos because she had all the tools to do so. He had begun collecting the stones before the events of Doctor Strange and her death.
Increasing the amount of available resources wouldn't change things in his mind: it would only enable people to continue using them and wasting them just like they had before, thus increasing the lack of balance he thought to see in the universe.
Assuming a proportional relationship between grip strength and what the average male American can lift, back-of-the-envelope math suggests Thanos could heft 120 million pounds, 10 million pounds more than the weight of the Titanic.
As per the user, the director of Avengers confirmed that Thanos was most scared of Iron Man. “Not because of his strength, not because of his power, not because of his power, but because of his suit,” he added.
Despite the fact that Thanos initially dismissed Nebula's claim and even the very idea of having children, INFINITY (2013) revealed that Thanos had a son named Thane with an Inhuman woman. Thane initially appeared human before he underwent Terrigenesis.
But when Ultron succumbs to the first assemblage of the Avengers, Thanos is ready to step into the scene. His first line in the MCU franchise proves the famous saying, "If you want something done right, you do it yourself."
Thanos was crying because he had to sacrifice Gamora to obtain the Soul Stone. He was crying because she was the person he loved the most in the world, and he had to give her up to accomplish his genocidal plans. The fact that he was still willing to pay the price proved that he didn't love her enough.