I have watched Arsenal through good and bad times and even in the bad times there were virtually no seasons where we lost at home to a trio of weak (you could even say poor) teams like WBA, Newcastle and Villa (current guise). Losing to Spurs at home was not unusual though, although capitulations like last season, to my knowledge, have only ever happened under AW in recent seasons.

Based on those stats alone I don't think there is any doubt we are in decline.