It fell to deaf ears that a packaged approach was the right way to go, given said software installed its own jungle all around the filesystem hierarchy, numerous times conflicting with software from other vendors with the same kind of recklessness.
Quite clear that any of these people lacked the understanding that having a longterm stable environment where everyone uses the same version of everything, is uncomparable with doing unsafe installations following the first forum-post you find online.
Devops learned them that cutting corners to empower yourself is OK, they could run their own systems quicker. Needless to say all the debugging (the search-engine based kind) that needed to be done after the facts was suddenly part of their job description, and filled up most of their time...