I only agree with #5 fan abuse.
The rest really tie back to money.
Money ruined everything.
The artists make too much too easy and burn out too fast. They have very little talent to last beyond an album or two.+
The producers and companies sell image and buy low. Once someone hits they tend to drop them so they dont have to pay them the big bucks out of their pockets and kill their own product. They stop pushing They sold this bullshit that production time costs so much. That is complete bullshit. They own the equipment and it costs a lot, but it is paid for dozens of times over. Once an artist gets some money, they buy all the shit they need and start their own studio.
Bands used to work hard to get known for years, They had lots of good fresh material. Now you are lucky if you get 3 songs you like.