what does the south park episode 'your getting old' (season 15 ) mean?

so normal the episodes have a meaning behind them but does the episode
show that south park is coming to a end becuae of like they are saying
things u use to like seems shit when ur older and also wen his mum and
dad argue is that like matt and trey expresing themselves of what they
think so wat do u think they are trying to say about south park