Who is the worst example of a beloved TV character, that became horrible as the series progressed due to bad writing?

Submitted ⁨⁨2⁩ ⁨weeks⁩ ago⁩ by ⁨bOt@zerobytes.monster⁩ to ⁨television@zerobytes.monster⁩

https://www.reddit.com/r/television/comments/1wo4gl9/who_is_the_worst_example_of_a_beloved_tv/