Hollywood is stupid and they didn't want to pay writers after the first draft is written. It may not be so much the writer is shit (they came up with some good ideas after all) it's that they don't have time to make additional drafts to fix plotholes, improve the dialog, etc.

Writing isn't just banging out something on a typewriter and it's pure genius the moment is written. It's a process that usually involves multiple drafts.

You gotta admit a lot of things feel like a first draft, and it's probably because it is. Hopefully these issues were sorted out with the writer's strike.

Because it's targeting the lowest common denominator.

It's generalizing the writing so that it generally appeals to generally everyone to increase engagement. This means that the show loses its specific attractions and it just becomes another generic TV show based in a different world.

Executives chasing profits with data they don't understand, or the show just sticks around too long.

it's not a simple answer but due to technology and environment, it's just the way things are. basically less care is taken to get each minute of output simply because it's possible. so many things. you don't have to log heavy reels around, you don't have to use a typewriter. each step is so much easier. before, there was a lot more care taken per step.

With streaming, it's become about volume not quality. Before there were only so many movie screens and straight to video made next to nothing.

Now straight to streaming can make a LOT of money. Plus streaming services are trying to pump their selection and in-house productions cost nothing once produced. So even average or just good enough content can be profitable.

Most of everything is shit, you just remember the few good ones, you don't remember the no name awful series that were airing together with Lost.