The TV show must be defined with a limited numbers of seasons, this will be much better for the writers, actors and viewers.
TV shows with 15, 16 or more seasons makes no sense !

I saw none of them. I should give up my life and spend more time in front of tv.

There was a series called “Designated Survivor” with Kiefer Sutherland that was really good for about 1.75 seasons - and then it was like they flipped a switch and it became trash. They introduced all kinds of liberal garbage when previously the series was politically agnostic. The producers definitely wanted their political agenda in the script. Needless to say it didn’t last long after that - not many viewers want to see a parade of homosexuals.

#1 I think I stuck with TWD until Rick exited then I walked away. The show was already on an unstoppable downward spiral long before that point. It became the same shambolic formula of x amount of peril (involving characters you know wouldn't die) a lot of standing around, 5 minutes of story progression and then the credits.

Amazing - all good films seems to be from the US (sarcasm cannot be ruled out)

Lost.
By the 3rd season it was merely tedious.

#1 When they started killing main characters in the dumbest ways and for no reason but shock. Hershel, Beth and Glenn. Then the whole look at the flowers when they kill the kid. Killing humans became too easy and the walker threat was a secondary threat to other humans. Might have been how the source comic was but that is not how the TV show was marketed to those unfamiliar to the comic.