The issue is his message and own words presents that he believes economic issues inherently trump social issues, even if he thinks that by solving economic inequality it will bring forth social equality.
That's an inherent non starter with me because I think it lacks insight on the actual core issue this nation faces, one that he fails to recognize when he keeps parroting why the US doesn't have nationalized healthcare, which is a massive portion of this country are fucking racists who flipped their shit when a black POTUS was trying to pass a public option to where one of the old blue dogs of the party killed it. When he makes an excuse about why he lost in the south being "not real progressives" (you know, black Democrats) while celebrating how he cleaned house in caucuses in white rural states, or makes excuse for the voters in Florida for voting in a clearly racist Governor.
He's said the same things over and over, and while he holds progressive values I see him keep making excuses that are not progressive, that tell me he keeps catering to a specific group of people that his message 100% resonates with, the same thing I've been saying in this thread. Which is why when I see him say those things, and I see his pure economist message, I see someone who is specifically catering and crafting his political view that is inherently not intersectionalist, and created to bring in people who would so willingly throw away social progress for economic "progress".
It's why Sanders is an outsider, because his message is completely at odds with the identity politics that drives the Democratic Party. And you can argue that it's a good thing he is an outsider for that reason, but when people repeat the same shit over and over where they openly state that it's the fault of people who cater to "identity politics" that "we're in this mess", that it's the fault of people finally having political voices and say, I call bullshit and inherently fight back against those people taking control of the party.