The performance of Slaven Bilic’s side was hugely disappointing, and Brighton deservedly picked up all three points from the encounter.
Many West Ham fans left the stadium way before the final whistle, as the supporters are clearly frustrated with how things are going at the moment.
The defeat to Brighton means that West Ham are now 17th in the Premier League table with just eight points from nine matches.
The London outfit are only two points above the relegation zone at the moment, and the situation look dire.
Former West Ham winger Sinclair has taken to Twitter to urge the fans to continue to support the team.
Anyone can play pretty football but unless you start running in behind off the ball to try and penetrate its too easy to defend against— Trevor Sinclair (@trevor8sinclair) 20 October 2017