I'm unsure why people are getting upset here, but the op is correct. Naruto gotten weaker and Sasuke gotten stronger after the war.
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Since the Shinobi world was at a time of peace and Naruto becoming Hokage, he had not time to harness his power while being busy as a leader of a village. Quite the contrary, he gotten weaker. Look at his performance against Shin Uchiha. Naruto's prime was in the war. With RSM he surpassed EMS Madara and Hashirama, but would lose with BSM.
Sasuke, on the hand, gotten stronger because he accumulated use of his Rinnegan and had no responsibility. Sasuke would have surpassed EMS Madara with EMS only, but would lose to Hashirama; with Rinnegan, he surpassed both of them.