Downsizing. If you don’t need to run or keep stuff, then you don’t need so many servers and storage. You may run stuff on cheap mini-pcs.

Sleep: In my experience sleep sucks, I’ve spent long hours planning around sleep in homelab, like: when do I restart, do updates, when do I upload backups. I have Pi and at some point I realised some actions on Pi need my sleeping NAS… so I dropped all the sleep and now it works 24/7.

Explain to your manager that if an employee can merge code without reviews, he should expect breakages on regular basis.

Propose that your team can meet to talk about how to make the process better, so no breakages occur.

Mention personal responsibility and knowledge - it’s a good practice that a person who wrote the latest code changes either helps either is responsible for making the service working again, if there are issues - specifically because they might have some idea what’s broken.

If your manager will ignore it, I’d start looking.