Let's see how Twitter reacted to the game... no prizes for guessing the gist of the comments...
"I expect so little of this club and our players, but I still keep getting disappointed. #WHUWBA #COYI #GSBOUT"
"10 morons and one beast (Antonio) feel incredibly bad for him, the only one who put a shift in #WHUWBA"
"Slaven Bilic was sacked as West Ham boss with the highest points per game tally of any other manager for the club
In his first game against his old team, he's knocked them out of the #FACup with Championship high flyers West Brom
"#whuwba another wasted afternoon. Thx for nothing you Millionaire cunts"
"They had 35 year old Chris Brunt and 38 year old Gareth Barry holding the midfield... that’s the level West Ham are playing at right now, can’t even pass around those two dinosaurs. Pathetic #GSBOUT #WHUWBA"
"This is fupping embarrassing, so much potencial put on this season and then we have this.. Gold And Sullivan please for the sake of the club and fans get out. We are done with all of your promises. #WHUWBA"
"Tell me what lanzini offers I’ll tell you fupp all useless twat who doesn’t care about the shirt and don’t get me started on Sebastian haller fupp him off absolutely abysmal we are going down if something doesn’t change #WHUWBA"
"10 man West Brom reserves beat pathetic West Ham 1-0 #WHUWBA"
"#WHUWBA What a crock of shit. £45m for Haller? The guy's second touch is to fall over! No movement. No passion. No desire. Ajeti? Shit too. Wilshere and Yarmalenko? Injured again. Pellegrini is a genius isn't he! Good luck Moyes taking over with that lot!"
"It will never end it will never stop until they go ! This is nothing new it’s been going on for 4 years now !! They gotta go !! We have the worse squad the worse manager an with out a doubt the worse BOARD in the whole world we a DEAD #WHUWBA #GSBOUT @BBCMOTD"
"Well done to West Brom totally deserved it .we was absolutely shite .and west Brom looked solid
#WHUFC #WHUWBA #wba"
"#WHUFC #WHUWBA very mixed emotions. Change needs to happen and #SlavenBilic has proved here that our owners should not have sacked him and that they create impossible operating conditions for ANY manager. Everybody thrives away from them.
#FACup @WestHamWaycouk @ExWHUemployee"
"Can’t believe how bad that was. #WHUWBA"
"Unless my eyes are deceiving me, West Ham appear to have been turned over by a West Brom side playing Gareth Barry and Chris Brunt in midfield #WHUWBA"
"I'm just going to laugh as that's all I can do! #WHUWBA"