TESLA employees have turned on its burned-out co-founder Elon Musk by describing the firm as a "s**t show".

His increasingly erratic behaviour, bizarre tweets and production problems are becoming a huge concern to his staff and investors, reports claim.

Once-loyal workers have described a company in chaos and their billionaire boss as someone who promises what he cannot deliver.

A source told the New York Post: "Elon talks about being a socialist and doing good for mankind, unless you work for them... It's a s**t show."

Until recently, Tesla investors and employees had bought into Musk's ambitious vision but that core belief may be eroding.

The same source added: "He is very difficult to move off his stance... He'll say, 'the car can do X, Y or Z', And yes, that is possible... two decades from now.

"He bases his argument on the physically possible rather than the practical reality."

Another compared staff meetings with Musk to the infamous Donald Trump cabinet assembly when they went around the table praising the president.

Some are worried about Musk's grip on reality following rants in which he claimed to be an alien and branded a hero rescuer a paedophile.

A staggering 3.6billion was wiped off the firm's value yesterday following one of his latest outburstS last week.

In a candid and often tearful interview, he admitted taking powerful sedatives, Ambien, to cope with the "most painful year" of his career.

It came days after rapper Azealia Banks claimed she spent a weekend at Musk's house while waiting to record with his singer girlfriend, Grimes.

Banks took to Instagram to say the tech guru had tweeted while on psychedelic drug LSD, known as acid.

She wrote: "I waited around all weekend while Grimes coddled her boyfriend for being too stupid to know not to go on Twitter while on acid."

Musk, who co-founded Paypal in 2000, has also picked on heroic caver Vernon Unsworth, who led the Thai schoolboys rescue operation.

Musk had previously donated a submarine to assist those those trapped in the cave - but it was rejected by those overseeing the plan as it was unsuitable.

In a mean-spirited outburst, Musk branded Unsworth a "paedo" and after he said the tech boss should "stick his submarine where it hurts".

The US government is even investigating Tesla after Musk tweeted to say he was taking the firm private after "funding was secured".

It later emerged that 55billion funding for the purchase had not yet been secured.

Last August, the Wall Street Journal exposed the divide between Tesla engineers working on self-driving cars and Musk's pronouncements about deadlines.

At least 14 people had already resigned and the electric-car maker continues to suffer a talent drain.