Randle did make the All-NBA No-Defense Second Team. IT was the POY on the first team.
It is shocking how bad Wiggins' defense is. If he can't play good defense with Thibs -- it's on him. (he got worse last year under Thibs)
The 2017 NBA No-Defense Player of the Year: Isaiah Thomas
A big part of Randle's problem on defense was that the Lakers were terrible at perimeter defense and he's not a rim protector (arms are too short). He found himself as the last line of defense against guys running unchecked to the basket far too often.
He's never going to be on the All Defensive Team or ever be a rim protector, but he's athletic enough that he does ok man to man and I expect will continue to improve as he gets farther into his career.