Reports said he almost immediately regretted signing with BOS, but Manny often looked very happy on the team, especially after winning multiple rings.
I agree, they botched the communication or position changes, and the Bloom promise made was a factor from the Devers' perspective, but the team needed him to change positions to make the club better. It seemed obvious the team was better with Bregman at 3B and Devers at DH or 1B. The point is, even if you think the position change idea is wrong, do you really think it's okay for a player to refuse a move? To then call out the GM publically? To then show up his next team's manager over a PR'er sent out to help the team win?
The guy became a cancer, seemingly overnight. Even if he had good reasons to be upset, he still became a cancer. To me, that is beyond debate. He is a cancer and just about every SFG fan is aware of that, now. They'd gladly undo the trade.