They had a good run for a few years but id say in the last 5 years or longer...for seasons with several after about S3 they start to get sillier to the point of unbelievable. Id say now it has even started to happen around S2 recently.
Secondly a lot of stuff is very...the samey and TBH boring, if something is good they try to repeat it over and over. Generally now i see the N sighn and i am like nah, its likely to be average.
I just realised what they have become. Years again when sky/cable existed there would be a channel that just showed average shows, or B movies. It’s the kinda thing your nana would watch. It was just churn churn of tat. It kept you occupied…but not entertained.