Disney's internal systems for something like this are a hodgepodge of the Hulu, D+/Bamtech, old corporate disney, and some bits sent out to SaaS. There's been multiple layers of layoffs and service ownership changes since the pandemic. I don't think the org would be able to rate limit by faking crashes if it tried.
What is happening is that routes and systems that normally have little and predictable traffic now are getting exercised... a lot harder (the exact numbers are for management to explain). Most things are going to be very resilient to this, as it's not THAT much traffic: It's still a small fraction vs resubscriptions and logins, but not everything is. Since the unsubscribe flows are never going to be anyone's top priority, this things happen.
You don't have to believe me, but I tell you it's incompetence, not malice.