The broad-strokes story is:

* DHH said some things on his blog that some people believe to be deeply racist / fascist (not going to unpack whether they were or not because answering that question is irrelevant to the fact pattern; consult other threads for that debate).

* A Ruby conference run by Ruby Central was asked to deplatform him. Since he's the creator of Rails, they declined.

* In response to their decision, a major sponsor (Sidekiq) pulled out of supporting the conference and Ruby Central in general, to the tune of $250k a year.

* This created a "blood in the water" situation where Shopify hit Ruby Central with an ultimatum: they would back-fill the lost sponsorship for oversight control of Ruby Central (and the gem repository they maintain, rubygems.org). And if Ruby Central didn't take the deal, Shopify was going to pull their funding also, leaving them in dire straits (this, BTW, is a fairly common corporate tactic when multiple partners share support of a service that doesn't independently generate revenue. Look for it in your own business, startup company, and nonprofit dealings!).

* Shopify now de-facto controls rubygems.org and people immediately started backing towards the exits because corporate takeover tends to be a harbinger of enshittification. As if to prove the point, Shopify's folks immediately ham-fisted the access controls, yanking several gem creators from the admin roles of the gems they created. They claim this was a mistake; several in the community do not want to give them a benefit of the doubt they are not believed to have earned.

* Community members are standing up gem.coop as an alternative gem repository.

Your addition also misses an important part where the only reason he was able to do that was because the servers were forcibly taken from the previous owners for the ostensible purpose of security, but the new regime forgot to change the passwords as part of that.

At this point, it's probable that any attempt to just list the pertinent events isn't going to end up being as neutral as one might hope because even the choice of what context to include or exclude is itself editorial. This is the same lesson people might learn in a high school history class, just applied to something much more recent.

Arko kind of did address it in his most recent blog post. He claims he was doing what was in Ruby Central's best interest.

Unfortunately for him he basically admitted to a crime because it came after he was terminated. He tried appealing to community and whatnot but anyone who's ever worked for a corporation knows that once you're terminated, it doesn't matter if HR forgot to take away your credentials or not, you simply don't attempt to access anything ever again. Having keys to something doesn't make you the owner.