ISTR a got an actual useful outcome from a support incident related to a bug in the runtime libraries shipped with Visual Studio 2005. Support gave me a hotfix.
Sadly the hotfix had its own little bug: installing it took about 20 hours. Office productivity was rather low for the rest of the day. I don’t know everything that goes on under the hood with Microsoft’s installers, but wow they’re slow.
I, blissfully, don’t use Visual Studio on Windows any more :)
At any point of this century, the response to those support incidents from MS was always to deny a problem, and if it's a known one, to try to gaslight the customer in a direction contrary to solving it.
I have seen organizations lose way too many people-hours trying to satisfy the MS support and apply what it recommended. That when the real solution was often reachable in a hour or two of research on 3rd party knowledge bases.