If places like Paramount+ can figure it out, Netflix, given their 10+ year head start on streaming and strong engineering culture, should also have been able to. And if you don't like my example, literally every other streaming service has streamed live sports without issue. YT TV, Hulu, Paramount+, Amazon Prime, Peacock, even Apple TV streams live sports.
It may be "new" to them, but they should have been ready.
I won’t argue that they shouldn’t have done better, I’m only pointing out that this is fairly different from their usual product. Amazon, YouTube, and Hulu all have a ton of experience with live streaming by now. Apple has live streamed wwdc for several years.
I did expect that Netflix would have appropriately accounted for demand and scale, though, especially given the hype for this particular event.
It may be "new" to them, but they should have been ready.