Bo's brother did a social media Q&A where he revealed that Dante Sr. was apparently a massive abusive asshole to him and potentially could've been to Bo as well (Dante Jr said he did his best to protect Bo from getting the brunt of it, but who knows what happened.)
"highlights" include Dante screaming at Jr after youth games and getting physical to the point of tearing his jersey/shirt off of him and essentially telling Dante Jr that their parents are going to put their effort into making sure Bo turns out well because Sr. thought that Jr turned out (using the words Jr relayed in his answer to the question) "Too soft and too gay."
It was also brought up somewhere that when Dante Sr hung around the Jays last season it was because a bunch of players wanted him around to help them with their hitting. For this season the team gave the final decision on whether or not he would return to Bo and Bo apparently decided to not allow it.