Conceding early goals has frustrated the Dutch trainer.
The Wearside outfit found themselves two down with not even ten minutes on the clock and ended up losing 2-0 to the newly promoted side.
With the Stadium of Light outfit still waiting for their first win of the new campaign, alarm bells are ringing in some corners over the potential for Sunderland to be relegated this term.
Advocaat has stated that he is very angry with the start his team made, which was the reason that the visitors lost the clash.
“I have all the respect for Bournemouth, but if you see their names on paper, you have to say that we had to do a little bit more than we did,” he told The Sunderland Echo.
“We cannot keep saying there’s 32 games to go. If you’ve played six games and you’ve only got two points, that’s not good.
“I’m very angry with the way we started the game.
“We knew with only two points from five games, that if you have a chance to do something, then it was here.
“We didn’t start playing until we were 2-0 down. By then, it is too late. I’m very, very angry with the players because this is not the first time.
“The way we gave the goals away... At this level, that’s not possible.”
Sunderland have picked up draws against Swansea and Aston Villa so far but have lost all of their other four games and as a result find themselves in the relegation zone.
The Black Cats have been guilty of defensive errors this season, with the team looking decidedly shaky when the opposition is on the attack.
Advocaat had changed his mind about leaving the club this summer and now must realise the magnitude of the job at hand, with Sunderland’s top-flight status in real danger even this early in the season.