Everybody I know is happy with what Hetzner provides, even at production level. OTOH, "arguably better" DigitalOcean sent me a "Your physical host died, so we restarted it. If it persists, we'll migrate" e-mail, which just shows the reality of the hardware.
On your question, while I do not have services on Hetzner yet, I manage a lot of servers, so I know dynamics of a datacenter and what it entails to keep one up.
You're linking this everywhere, but it has absolutely zero relevance.
Your beef is not with Hetzner, but whoever decided to run the service. Unless the customer violates local legislation or the hosting providers ToS, the appropriate action is to leave the service running, be it AWS, GCP or Hetzner.
I would quite frankly have been very disappointed with them if they had done anything in response to you request.
Single machines die (and can't be started again for a few minutes to hours) every few months, but that's acceptable for me, and we also similar things happen at AWS.
I do. I just rent 2 computers from Hetzner. One is main another is failover. If main dies failover kicks in while main is restored on another computer. Still way way cheaper than AWS which I would not touch with wooden pole unless required by client.