I completely understand fan 'banter' and rivalries with songs although the Gerrard slip is the most hypocritical thing going.
The fact that the slip didn't help them in the league and City won it anyway AND that their own captain slipped to directly cost them winning the Champions League not that long ago - its baffling
Its a lot to do with how Liverpool were portrayed last season. Nearly every media outlet you saw was romanticizing Liverpool and spurring them on to win the title and this 'media darlings' attitude did get annoying to see for opposing fans. So to see Liverpool lose the title after a slip by their iconic player was hilarious tbh in the context of things at the time
But I agree, it is getting old now and Gerrard is a fantastic player who deserves to be respected