I don't understand this sort of blindness? Linux fails all the time, with rather terrible nobody to root vulns because some idiot failed to use the right bounds check. Ye gods, XZ utils was barely a few months ago!
Every system gets attacked, but I think your point shows that even with state-level attacks Linux handles it better than other platforms.
I'd also say this wasn't a good example of 'linux handling it better': usually when a mess like this occurs on windows all the corps get a quiet tap on the shoulder that they need to immediately patch when MS releases it, then a few days later it hits the news. In XZ's case, the backdoor was published before the team knew about it, huge mess.
> all the corps get a quiet tap on the shoulder that they need to immediately patch when MS releases it, then a few days later it hits the news
AFAIK, distros were notified and released a patched version of xz like a week before it hit the news, so at least a lot of machines received it via automatic updates.