Saying that the left spends too much effort on rhetoric might be valid criticism, but focusing on it as reasons to "walk away from the left" (which not too many black Americans are doing, BTW) is disingenuous. Sure, the left talks about rhetoric, but it also fights for higher wages, civil liberties, healthcare, affirmative action, investment in education, workers' rights, and voting rights. It's fine not to like ever…
problem with this line is that those in power now in America aren't solving any of these issues. they engage in window dressing and have been doing so since at least Clinton. they are left-INO. What US considers center left actually is right. Unless a new progressive party is formed (AOC, Sanders etc) and this party manages then to become a serious contender and accepted in mainstream, US politics will remain what it is: a farce.
edit: Right Marcuseanism - Herbert Marcuse’s “Repressive Tolerance” is often cited as the progenitor of the censorious left, but its real ideological heirs are now on the right: https://outsidertheory.com/right-marcuseanism/ (I shared this yesterday and it's a shame it hasn't gotten more traction considering it goes much deeper into the problem than any (justified) rant on master/slave branches and Tech/github's hypocrisy)