That doesn't really say anything though: "Things were bad, and it felt out of control, because of microservices. They didn't work, and actually made things worse and more complex. The things that were supposed to be good were bad. We didn't do good work, we did bad work, and slowly."

How do you address something like that coherently? I sort of agree with the OP, it kinda sounds like they just didn't know what they were doing. Or maybe that quote wasn't really the meat of their complaint?