Clearly why he signed with the Angels.
Ohtani doesn’t care how the Sox “treated” Betts and Bogaerts. He’s going to take the largest offer. He didn’t hire an agent to get him to a “star friendly” team, because that won’t matter. His contract will be guaranteed. And if he for some reason neither of us can comprehend decided the Sox were unfair to Betts, or, as I’m recently hearing was a star, Christian Vazquez, his agent will deftly explain how that benefits Ohtani, by freeing up more money.
Or maybe Ohtani will talk to the one star on the Sox he knows - Masataka Yoshida. I’m sure Yoshida has plenty of tales of mistreatment.
I have extremely serious doubts Ohtani signs in Boston for one obvious reason - they simply don’t pay the most to star players anymore. Having Yoshida is really the only thing that keeps them in the running, but even that operates on the assumption the two actually like each other..