Or the person working that role before you did and you are trying to manage the situation as best as possible.
We (the team I built out since a couple years ago) carve out a new AWS subaccount / GCP Project or bare-metal K8s or whatever the environment is, instantiate our GitOps pipeline, and services get cut-over in order to get supported.
When I was working in individual contributor roles, I managed to "manage upward" enough that I could establish boundaries on what could be supported or not. Yes this did involve a lot of "soft skills" (something I'm capable of doing even though my posts on this board are rather curt).
"Every DevOps job is a political job" rings true.
Do not support incumbent K8s clusters, as a famous -- more like infamous -- radio host used to say on 97.1 FM in the 90s: dump that bitch.