I think they look bad on everything
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The contrast between the thin and small in height headlights and the outrageously tall grills next to them is the biggest problem. Nothing is in proportion.
The F80 had it right, the grill and the headlights were proportional to each other, and created a nice open space that goes across the entire middle portion of the bumper. On the new cars, this is broken up by the grill and creates an awkward appearance of different spaces in different sizes. This proportion of design is evident on all past generations of M3. Even the E30, which had vertical kidneys, was proportional to the headlights in size.