I think more broadly it's because the Democrats have nothing to materially offer anyone who's working class. On the other hand, Trump does tap into a vein of male spite and rage that cuts across racial lines.

Working class Latino men are shifting towards Trump for the exact same reasons that working class white men in the Rust Belt did. Men are falling behind in the knowledge economy and their economic precarity challenges their masculinity. You could see the first signs of this with incels/the red pill imo, they were a canary in the coal mine. Contrary to popular belief, they aren't all mayo ass white boys, they are pretty diverse. There's just a growing resentment by men towards women that crosses racial lines. Black men are next. The Tariq Nasheed/Patrice O'Neal crowd is pretty big and will be shifting towards the GOP

Joe campaigning to Latinos would have been a massive waste of time, and his campaign team was smart enough to recognize that.