There are many good sources for TV ratings. You can try your local paper to start with. Other sources include TV guide sites, blogs on TV, and TV based forums.
rottentomatoes.com
Personally I have found television to be a rich source of entertainment and information, so yes, television is good.
A Good Murder - 2006 TV is rated/received certificates of: Australia:MA15+
The Good Witch - 2008 TV is rated/received certificates of: USA:TV-PG
Good Fences - 2003 TV is rated/received certificates of: Australia:M USA:R
The Good Fight - 1992 TV is rated/received certificates of: Australia:M USA:PG
The Good Mother - 2013 TV is rated/received certificates of: USA:TV-PG
The Good Mistress - 2014 TV is rated/received certificates of: USA:TV-14
There are several websites that offer reviews of LED Televisions. Consumer Reports is also a good and honest source of review information so check those sources before purchasing. Consumer reviews are also available on most websites.
People are morbid enough to watch and it gets good ratings. If television shows get good ratings more companies will be interested in advertising and the station will make money.
While many websites will give reviews of different television shows, there is only one good website. The best website by far for TV ratings is www.nielson.com.
Good Morning Tomorrow - 2003 TV is rated/received certificates of: Canada:PG