Allardyce acknowledged it was a poor display after watching his side fail to seriously trouble Stoke keeper Asmir Begovic.
"At home, I haven't seen us play that badly since we've been back in the Premier League, sadly," Allardyce said.
"We have to accept that at this moment in time it looks like we're still establishing ourselves in the Premier League.
"We still can't quite reach the level of consistency this league demands. It was a really off day for us, a bad day. Our back four limited Stoke very well.
"But the front six in terms of creativity really wasn't there. It really wasn't good enough and we played poorly, individually and collectively."
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