When I started to use elastic search I found out that with some incorrect queries you could "poison" the process entirely and it would respond incorrectly to every single query from that moment on, until you killed it and restarted it.

They responded to my issue several years later. I had changed jobs and I couldn't care less any longer.

If that's your example of quality… well…

If a single outlying case in a broadly used piece of software is your example of an entire language's developer base, well...