Even in his best times, his defending isn't great - and definitely not top level/elite. He's been slightly more switched on this year, as Slot seems to require more focus and control from his players, but he's not great 1v1 and positionally he's below par. He's obviously not every week as bad as he was on Sunday, but he hasn't magically become a good defender, his strengths lie elsewhere. And putting it down to only "he can't be arsed" has strong vibes of Eden "I could be Ballon d'Or if I wanted" Hazard. He just doesn't have the basics of a strong defender, whichever way you look at it.