FWIW, I think he totally squandered an opportunity to be a substantial electoral force in Scottish politics. He had the base, he had the cash, he had the ear of, how shall we put this, a certain senior figure in the movement. And he blew it.— Kenny Farquharson (@KennyFarq) February 18, 2021
The above is practically the quintessential Kenny "Devo or Death" Farquharson tweet, in the sense that it's wrong in almost every respect. A Wings party would not have been a major electoral force - it most likely would have attracted somewhere between 0.1% and 2% of the list vote, which wouldn't have been enough to win any seats, but might have been enough to do real damage to the pro-indy cause by taking votes away from larger parties.
But neither is it true to say that Mr Campbell "blew it". He had the capacity to set up a new party, but he freely chose not to. I suspect Kenny is trying to get a narrative going that "Stuart Campbell blew his chances by being beastly to my mate Neil Mackay" - well, that's about as well-founded as his legendary prediction that Kezia Dugdale would be the next First Minister. (There's still hope, Kenny! Ian Smart says she's an SNP sleeper agent, so maybe she'll make a comeback that way!)
The interesting question now is which fringe party Wings is planning to back in the election. We can safely assume he'll be openly hostile to the SNP, which presumably means he'll be supporting either ISP or AFI. My guess is he'll plump for ISP, if only because they share his preoccupation with the trans issue.