I think trying to man-mark Haaland is a mistake. He's too powerful. You have to cover the spaces around him and cut off any opportunity for him to get into his stride. Easier said than done. Also, VVD has kept him quiet when they have squared up. About VVD, Haaland said, "You know how tall he is, how strong he is and how fast he is, and also the timing is crazy. I don't think I won one duel against him because he's a physical monster."
That said, not every defender is as good as VVD, and yep, Haaland looks frightening.
Fun Fact: In his two seasons at Dortmund, he never outscored Lewandoski. Granted Lewandoski played for Munich, but still.