Slaven Bilic could not hide his frustration after Albion had to settle for a share of the points at home against Charlton Athletic.
The Baggies boss claimed referee Matt Donohue favoured the visitors from the first minute when he was pressured by Charlton players into an early booking for Jake Livermore.
Donohue was again centre of attention just after the hour mark when he sent off Nathan Ferguson for a strong challenge - after he had wrongly shown Grady Diagana the red card.
Bilic was further incensed in stoppage time when the referee awarded a penalty after Charlton defender Naby Sarr went down dramatically after minimal contact from Semi Ajayi when the pair challenged for a header.
"The red card wasn't blatant or malicious," Bilic said to Radio WM. "Nathan is a young player and he went for the ball.
"He got the ball but he didn't get enough of the ball to not give him an option.
"We were magnificent from the start of the second half. Then they had that little spell and the red card - but we didn't feel it, we defended really well, attacked in numbers and scored a great goal and we were managing the game quite well.
"That decision was beyond me - it's not a penalty. To give that, it's scary."