It's been going downhill for a while, even before AI. The VC-funded React SaaS craze took the "put something barely functional on the web, make some subscription cash" model and scaled it to what is essentially a scam/spam industry.
So if the UX feels increasingly framed in terms of what the "developers" see/want/believe to be profitable, and less from the actual user's perspective, that's because the UX was sketched by hustlers who see software development explicitly as a "React grind to increase MRR/ARR."