In this final aliyah of Parshas Toldos, Yaakov Avinu sets out on his journey to Paddan-aram following the tzava'ah and brochos of his father Yitzchak. He departs to fulfill the rotson of his parents, both to escape the anger of Eisav and to find a choshover shidduch from the family of Lavan, keeping far away from the bnoth Kena'an.
Eisav observes these events and takes note of how much his father despises the daughters of Kena'an. Realizing that his own Canaanite wives are bad in the eyes of Yitzchak, Eisav attempts to patch things up by going to Yishmael and taking his daughter Mahalath as an additional wife.
This aliyah recounts Yaakov's departure to Paddan-aram to the house of Lavan, obediently following the directives of Yitzchak and Rivka. Upon seeing Yaakov's kibbud av v'em and realizing how deeply Yitzchak disdained the local Canaanite women, Eisav goes to Yishmael and marries his daughter Mahalath, the sister of Nebaioth, adding her to his existing wives in an effort to appease his father.
Look at what happens here in the pesukim with Esav. He sees that Yitzchak blessed Yaakov and sent him away to find a shidduch, commanding him not to take a wife from the Bnos Knaan. Esav realizes that his father hates these Canaanite women. So what does Esav do? He goes to Yishmael and marries Machalas, the daughter of Yishmael. But look at the phrasing: "al nashav", on top of his existing wives. He did not get rid of the wicked Canaanite wives he already had! He just added another wife to the mix, thinking he was fixing the problem.
The Torah is coming to show us a profound sevara in human nature and avodas Hashem. Esav understood that something was wrong with his life, but his way of fixing it was totally external. Instead of doing real teshuvah, uprooting the bad, and removing the bad influences from his home, he just tried to paste a good deed on top of his rotten foundation. He thought, I will keep my bad habits, but I will add a frum-looking step on top, and that will make everything kadosh.
How often do we fall into this exact same mistake? A Yid feels a void or knows he is doing something he shouldn't be doing, and his yetzer hara convinces him to just add a extra chumra or do a nice segula, while leaving the bad habit untouched. Real avodah requires us to clean out the bad first. You cannot build a kadosh home or a pure neshama by just adding good things on top of lingering tumah.
Take one practical area in your life today where you know something is wrong, and instead of trying to cover it up with a good deed, take one real step to actually remove or stop the bad thing itself.