its not that complicated really, take one middle age man or wyman who feels out of touch, mix in a few 20-somethings "creatives" who have lived their entire live sheltered on twitter thinking that saying shit you say on twitter is the way you talk out loud, mix them together and you end up with a monstrosity where scripts are written like reddit threads and casting is done based purely on "how would this look as a instagram banner".
For now Netflix, HBO, amazon, etc have a mix of "this is what people want" and "this is shit nobody is wanting" and the former props the latter. Remember as well the simple fact that white women control a huge chunk of streaming consumption and they have extremely specific tastes (hot men thirsting after simpleton white women, lots of murder, random cooking and decorating and house/shoes/clothing glam) and bam you have the current entertainment industry.
No more Rome, Black Sails, The Wire, Mad Men, BSG, TNG, etc or what I'd consider the golden age of TV. Its all Bridgerton, Greys Anatomy, Crown, Queens Gambit, etc. You have to take the Mandalorians, Cobra Kais, Ted Lasso's, etc as scraps and in a few years I'd expect "strong men" shows to completely vanish.
