The Baal HaTurim writes that עשו is the same gematriya as שלום, peace.
Eisav is peace?! He is the exact opposite of peace! What is the Baal HaTurim telling us?
We can explain that Eisav made peace with the yetzer hara. He decided that instead of living a life full of inner conflict, he would make peace with the yetzer hara and let the yetzer hara have his way.
If you don't fight the yetzer hara, you will always remain the same. There is no growth for you. And this is the reason Eisav was born looking like an adult, to indicate that he will never change. He is who he is and doesn’t want to change and grow. He doesn't even want to eat with a bowl and spoon; it is too much work. He told Yaakov נא הלעיטני, pour the soup into his mouth. He was שדה איש ציד יודע איש, and Rashi writes that שדה איש means "An idler who hunts beats and birds with his bow." Rashi writes, אדם בטל, Eisav was a person who does nothing—a leidigeir.
Yaakov, on the other hand, was אהלים יושב, constantly seeking to grow higher.
When Rivkah passed the doorway of the beis medresh of Shem and Ever, Yaakov tried to leave the womb. Why did he want to leave the womb? Chazal tell us that a child studies with a malach in the womb, so why was he anxious to leave?
The answer is that he wanted to learn Torah with yegiah, to toil in Torah. He didn't want to receive the Torah on a silver platter. It's the struggle and toil that is the primary praise of tzaddikim.
Others answer that even learning Torah from a malach isn't worthwhile if it is done in the company of Eisav.
Thirteen years later, Eisav foolishly sold the bechora for a bowl of soup. We see that Hashem will help if you desire and try. Yaakov tried to be the bechor, and in the end, he got it.
Yitzchak's servants dug wells, and there were quarrels over them, as is discussed in (26:20-21). The local shepherds claimed ownership of the wells. Therefore, they named one well עסק, and the other one שטנה, representing the hardships and the fights that they had over the wells. But the Torah doesn't tell us who won the argument and ultimately received the wells. This is hinting at our fight with the yetzer hara. When one fights with the yetzer hara, the goal isn't necessarily to win. It is to stand firm and try.
Yaakov's name became Yisrael, as it states (32:29) ותוכל אנשים ועם אלקים עם שרית כי, "Because you have battled with a malach and with people and you have prevailed."
