Personnel is obviously a problem, but here are two miserably faulty Red Sox approaches:
1). pitchers throwing more breaking pitches that cause more contact so bad defenders have to make more plays.
2). batters trying to hit every ball in the air, even at the expense of nightly rally-killing strikeouts.
Acquiring Crochet and Chapman were good moves because strikeout pitchers don't pitch to contact. Signing Bregman was obviously good, because he's a star batter who can actually field.
You can't replace most of the others all at once, especially high-paid busts under contract, but you can change approaches #1 and #2 with coaching mandates... especially the latter -- because professional hitters with hand-eye coordination elite enough to get them into the majors can all handle a bat with two strikes, choke up, get closer to the plate, and shorten their swings to make. freaking. contact.