Steve Bruce was left fuming after defeat at Premier League basement boys Sheffield United extended their winless streak to eight matches, but vowed to carry on as Newcastle manager.
The visitors were reduced to 10 men when Ryan Fraser was sent off just before half-time on Wednesday night.
And their misery was compounded when referee Andy Madley awarded a penalty after being advised to visit the VAR review monitor and deemed Federico Fernandez had handled in the box and Billy Sharp scored from the spot.
'The first half was arguably as poor as we've played for a long time, there's no disputing that,' said Bruce.