"As with many clubs in Premier League and in Europe, the manager is the one who is paying the price for it".
"We need somebody with experience, knowledge of the Premier League and the players in it, and we believe David is the right man to turn things around and get the best out of the players at the club", said Sullivan. "He is highly regarded and respected within the game and will bring fresh ideas, organization and enthusiasm", Sullivan added.
Those were qualities he couldn't deliver at United or Sunderland, though.
While it is not quite stepping into Sir Alex Ferguson's shoes at Old Trafford, Moyes finds himself replacing another popular figure in the shape of Bilic, who the fans never turned on despite their struggles over the last 18 months.
The Scot has not enjoyed much success in the dugout in recent years after failing to last a season at Manchester United, spending a mixed year in charge of Real Sociedad and then presiding over Sunderland's relegation.
The Croatian's contract was up at the end of the season.
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"I'm really looking forward to meeting the supporters, being in the stadium with them", he said.
"It wouldn't be a lot, let's face it we believed at the beginning of the season that we had the best squad of players for a decade. We need the support, we need everyone with us". He will be telling us what he thinks we need.
Moyes' first game in charge will be at Watford in the Premier League on 19 November. Moyes largely froze out the Mexico striker during his time at United.
To no one's surprise, David Moyes was announced as the new West Ham manager early on Tuesday morning. West Ham suffered a 3-1 defeat at home at the hands of Liverpool last weekend. The team has been prone to collapsing after going behind it has already lost by at least a three-goal margin on four occasions this season and lacked any real identity under Bilic.
West Ham have had a dire start to the new season and a change was certainly needed for the club to start heading in the right direction.