I think most of Red Sox nation was disgusted by 2019 and knows our pitchers are high injury risks and not likely to lead us to a ring in 2020. I may be wrong, and I don't live in New England anymore, but Sox fans aren't dumb, in general. Most might be fine with 2020 being viewed as a rebuild year, as long as they feel we'll be back in contention by 2021 or 2022.
BTW, any trade of Betts that I would go along with would have to be for a decent return. To me, it doesn't have to be ML ready studs in return, as long as Bloom shows an over plan that gets us back to the top within 1-2 years. Also, I have said many times, if I trade Betts, I'm still going all out to re-sign him in 2021. To me, that would be the best of both worlds. Get something very good for him and then bring him back. (If we lose out on the bidding, let Bloom take the $30+M and spend on multiple lower cost bargain signings.)