Please do then.
If you are seriously saiyng that Buffon hasn't made one, as in singular, 'blunder' in 3 and a half seasons.... then yeah, there's really nothing up for debate. For reference, go to post 450 in this thread.
You were soundly beaten by Napoli and Roma, for one. You are currently behind the likes of Atalanta and your junior in Sassuolo. You're still in contention for a top 3 spot, but don't go around claiming other teams are mediocre, when you've had the worst start to a campaign in more than 50 years.