The handling of trans issues is just one example to illustrate the problem here. People on the left think trans rights are human rights while people on the right think a lot of trans issues should be open for discussion, legislation, persecution, etc. I think if we're being intellectually honest most would acknowledge that as a country we are far from consensus on many of the details here (bathrooms, girls sports, etc), and yet Twitter's rules and enforcement actions behaved as if the leftist view of transgender people is the only valid and permissible view.
The handling of January 6 and the banning of Trump is another example.
These things are Rorschach tests; people apply their biases and reach very different conclusions about what should be done. I don't claim to know the solution, I'm just trying to sketch out the problem with the way things were creating a climate where a big segment of the US felt unwelcome and resentful toward the platform.
This presents a problem for the platform, since you can't afford to alienate large double digit percents of the population if your mandate from shareholders is to grow mDAU by any means necessary. In that context, having some metrics tracking in place to measure the impact of algorithm changes on democrats and republicans to see whether impact is disproportionate is a completely rational thing to do.
