Poor Dickerson. He hit much better than his numbers said.
This is true. Setting the limit to 30+ PAs (just to get Dickerson to qualify):
wOBA/xwOBA/difference
Dickerson, Alex .193 .321 -.128
Rosario, Eddie .134 .236 -.102
Arcia, Orlando .330 .431 -.101
Ozuna, Marcell .341 .393 -.052
Riley, Austin .403 .447 -.044
Duvall, Adam .233 .266 -.033
Swanson, Dansby .254 .275 -.021
d'Arnaud, Travis .355 .361 -.006
Albies, Ozzie .369 .369 .000
Olson, Matt .430 .429 .001
It should be noted that the whole league has been "unlucky" this year due to the new baseballs with less carry, but Dickerson has been hit especially hard.
Compared to the entire league he's #8 out of 316 batters with 30+ PAs. Someone is going to get a roughly average bat for free.