This is not quite 'much ado about nothing'. But it's leaning that way.
I have a long history as an activist, and I can state with certainty that - because of our values - we have always been more prone to internal wrangling. Sometimes to the point where it becomes a distraction from the primary mission. I saw the same dynamic when us young whippersnappers flooded into the existing anti-war organizations during the Vietnam War. And that's ok. As long as it doesn't totally derail the organization.
In any system, including organizational development, it helps to remember that there are two ways to look at what you're up to: process and content. Lefties tend to put more emphasis on process issues than those on the right do, and we are concerned about more sorts of process issues than 'efficiency' (the right's main concern). Dealing with those issues takes time, which is a weakness. But it can also be a strength in several ways.
Since these days I'm not in a leadership position in any or the organizations I work with, save one, I can't say if we've reached the 'derail' point. From my wife's tales of the UUA, there's currently an overabundance of political correctness, pronoun angst, and suchlike. But not to the point of dysfunction. Just one datum.
So, for now, I'm gonna view this as a time of tumult and transition... and run with one of the quotes in the article --
Many progressive organizations are being led by women and people of color for the first time. This shift accelerated during the pandemic, largely in response to the murder of George Floyd and other factors, and so these folks assumed leadership during an especially difficult moment for our country, and for their organizations as well, since so many organizations on the left include a focus on race. There have always been differences over strategy — how to do our work, who to engage, etc. — on the left, but the fact that the staff and leadership ranks of many progressive organizations are more diverse means that certain ideas about strategy that once predominated are rapidly being displaced. This, inevitably, has also caused tension, but also creativity.