The Toffees were not at their best at the Vitality Stadium, as a Callum Wilson brace and a goal from Ryan Fraser was enough to see them off, despite Dominic Calvert-Lewin cancelling out Wilsons first just before half-time.
Delph, an £8.5m signing from Manchester City in the summer, lined up in the Everton midfield and was increasingly frustrated with the performances of his colleagues.
During the second half, the England international was spotted shouting Everyone is f***ing s*** right now, as his frustrations grew.
Things only got worse for the 29-year-old as this came before he would deflect Frasers free-kick into his own net to put his team behind.
It looked like it could have gone down as a Delph own goal, but it was given to the Scot as his blushes were spared.
Evertons inconsistent start to the season continues with the defeat on the south coast as they have now won two, lost two and drawn one in their opening five league matches.
After keeping clean sheets in their first two Premier League matches of the season, they have now conceded seven in the following three and sit 11th in the table after the defeat.
Everton boss Marco Silva told the BBC after the game: It was a big frustration. We gave some things too easily to our opponent. We have to be ruthless away from home & have to be clinical in attack.
To win our away games we have to be more aggressRead More – Source