Hot take but I seriously think both Agile/Scrum and "make a single dev do a ton of things that wouldn't necessarily count as software development" (like RDB design and management) is the direct cause of all of these problems. It is my opinion that Agile/scrum (or, at least, the "agile"/"scrum" that corporations understand) institutionalized the "move fast, break things, consolidate everything into as few positions as possible" mindset, in the name of things like "reducing expenditures" and "ship things really fast and damn the consequences". That includes, oh, I dunno, dumping QA/QC and putting all of that on the end-users. Maybe the real Agile might not do this, but I can't say because, from what I know, very few, if any, corporations actually use the real Agile at all, and instead repurpose the word to mean a completely different system.