It can be funny but it's so offensive and gross that it's hard for me to watch. Within 5 mins I turn it off bc of some crude joke. Used to watch it a lot. Now it has this trend of saying things that aren't funny and have no discernible meaning except maybe to the writer--but the character says these lines as if they are a punchline. Like, how is a random guy mumbling "is this 1981?" even funny? It's just a random pop culture reference. South park did a show making fun of family guy. They had manatee picking random pop culture references out of a tank, to write the scripts.
It's insulting to me the family guy writers' attitude is that we are so dumb we will laugh just because something is said in the tone of voice of a joke.
A recent episode I turned off made jokes about snuff films and really evil stuff related to that I won't post. The argument "but they are just satirizing people that watch these films" doesn't work because everyone decent already knows those films are evil. No need to satirize it. People who do view such films are beyond being changed by a supposed satire. So all this shock humor does is desensitize us to violence and evil. Why would a show need to do that? Also, shock humor replaces actual humor, which takes talent. Shock like that without substance, taken that far, seems like bad writers.