Yes, I agree that Hillary was the Democratic establishment's preferred candidate, part of that is because of Bernie's political affiliation but I also think that Bernie had some genuine problems reaching the many Democrats of color. Sanders definitely failed to strike the right tone with black voters and black women, in particular, who are not only a vital part of the Democratic voting base but the most consistently reliable in terms of voting. And we weren't voting for Bernie.
Consequently, I can see Michael Bloomberg having some of the same issues, if not worse than Bernie, due to Bloomberg's shift back and forth between political party affiliations, among other issues. People in NYC regretted that third term pretty early on after he won re-election and national politics is often less forgiving than the local political scene where, perhaps pragmatism is overlooked, if not rewarded.