10 years in EE (embedded systems, defense industry), then 15 in what we now call devops/architecture. Experience is fine. I have no problems being arrogant about that. I've fallen down a lot more holes than a lot of people and know what I'm talking about.

When I say tested properly, I mean tested completely. If you miss an entire functional unit of the software and a client reports it as broken, its pretty obvious what the problem is.

Our senior software guys sat down for the other four hours and presented all our findings together and cumulatively said "we're not supporting that shit; we can't trust it".

Regarding #4, it's plain to see that RHEl was released with a broken systemd implementation due to deadline...