The radio legend announced on Friday 24 February he will be leaving the station after 31 years on the air, being replaced by Vernon Kay.
He will now be moving to Greatest Hits Radio.
However, the Scottish broadcaster has since tweeted revealing the BBC had sped up his exit, meaning he leaves in just a week's time.
On Twitter, Bruce wrote: "I will be presenting my last show on Radio 2 next Friday. I had intended fulfilling my contract until the end of March but the BBC has decided it wants me to leave earlier. Let’s enjoy the week ahead!"
The reveal went down badly with his devoted fanbase, who believe he should've been allowed to complete his contract after so many years of dedicated service to the BBC.
"That is a great loss to R2 but the way many companies seem to behave," wrote one. "Nothing for me at all on @BBCRadio2 now. Look forward to listening on ghr."
I will be presenting my last show on Radio 2 next Friday. I had intended fulfilling my contract until the end of March but the BBC has decided it wants me to leave earlier. Let’s enjoy the week ahead!
— Ken Bruce (@RealKenBruce) February 24, 2023
"I really hate how the @BBC does this to their most stalwart and beloved broadcasters. This is rubbish," added author Emma Kennedy. "You’ve been a constant delight Ken. They’ll miss you. We all will. Onwards to new adventures."
"This is awful behaviour from the BBC," a third said. "They should have been planning an appropriate send off for someone who has played no small part in making R2 one of the world's most successful radio stations, not petulantly conspiring to pull the plug earlier than necessary."
Celebrity friends and colleagues have also shared their shock, with many crediting exactly how much Bruce has influenced their career.
Carol Vorderman told him: "I couldn’t wish you more love in the world Ken. Thank you for everything you’ve done and the smiles you gave Whiters and I on Countdown so many times Onto your next huge chapter."
Journalist Ken Goodwin added: "Ken. They do not know the value of the talent they have. Until it is gone."
Even Jeremy Clarkson shared his best by writing: "I’ll miss you Ken."
The BBC have since released their own statement that reads: "Ken decided to leave Radio 2 and it’s always been known he’s leaving in March. Returning to Wogan House for a week after a month of broadcasting the Piano Room sessions at Maida Vale provided a natural break. We wish Ken all the best for the future."
On replacing Bruce, Vernon Kay said: “I’m absolutely over the moon to be handed the microphone to present the mid-morning show on Radio 2, and what an honour to follow in the footsteps of the mighty Ken Bruce.
“I look forward to playing some of the best music in the world whilst in the company of the Radio 2 listeners who I feel I’ve got to know over the last 18 months. It’s a dream come true to join the Radio 2 family and I can’t wait to start.”
WATCH: Vernon Kay set to replace Ken Bruce on BBC Radio 2