Arsenal boss Mikel Arteta raged against Newcastle United’s winner at St James’ Park on Saturday.
Anthony Gordon’s scrambled goal was allowed to stand after three VAR checks.
“I have to be here now to say it is not acceptable,” Arteta said.
“We didn’t deserve to lose the match. We lose the match because of the clear and obvious decisions. It’s embarrassing. A disgrace. That’s what it is – a disgrace.
“You cannot imagine the amount of messages I got saying this cannot continue. I am wasting my time. We are wasting our time. I don’t want to be in the hands of people.”
The Spaniard continued: “It’s embarrassing what happened – how this goal stands, in the Premier League – this league we say is the best in the world. I’ve been 20 years in this country and now I feel ashamed. It’s a disgrace and there’s too much at stake here. We are trying to do incredible things and be at the highest level each week.
“The outcome is nowhere near the level this league needs to have. It’s not good enough. I feel embarrassed to be part of this.”
Arteta also said later: “It’s not a goal – it’s simple. For a goal to be allowed there are certain things prior to that that are not allowed in football – here and in China, in Japan, in Italy, in Portugal, and Spain. That’s what happens.”