Throughout it's existence Google has been revered as a company for its engineering output, but if you interrogate that even a little bit, you end up with a very small minority of gems among a massive ocean of over engineered crap. Even the huge objective open successes like k8s are to this day sold with the massive caveat of "it's heavy & over engineered, but": nobody's calling k8s elegant. Pretty much all of their good products are acquisitions, many of which they've subsequently degraded.
One can certainly make this argument about almost any large corporation, but I do think there's very few with such a stark divide between how the quality of their engineering work is revered & the reality.
Amazon hasn’t built anything innovative since the Kindle.
Surely it’s a consequence of being publicly traded that these companies cease to be able to develop good novel products rather than acquire competitors or iterate on past successes.