Jaden McDaniels has long been one of the league's best on-ball stoppers. However, Chris Finch treats him like a superhuman, which he's obviously not. The Minnesota Timberwolves forward ranks in the 99th percentile for matchup difficulty per B-Ball Index.
At the surface level, that's not a bad thing, as noted, McDaniels is a fantastic on-ball stopper who can take stars out of games. His overall defensive field goal percentage of 44.2 is still stellar.
The problem is that you can't reasonably ask McDaniels to contain the league's best players every night, and when he struggles, Finch does little to support him.