Opinions on players are hard to shake. Usually, either you like a player or you don’t - there is no in between. Whatever a player does on the field, your initial opinion of that player is the one you carry with you for all time. Sometimes the player’s salary has a correlation to likeability, but more often, it’s just that particular player’s performance that determines how well liked that player is amongst the fanbase.
There is much ire being directed at Nick Castellanos these days. Deservedly so. His early season performance has not been the biggest problem with the team’s inconsistent performance, but it seems to stick out the most.