This thread is confusing. I think it would not be wrong to say Flybe was not in a good state in December. It had hope from the new ownership structure, but it was not out of the woods.
Covid then came along and I do recall press releases about booking falling off a cliff. On top of that the new owners bookings were presumably seeing a similar pattern and it would have been only a matter of time before they had to prioritise funding their mainline airline survival.
Whether it was Virgin or one of the other investors it was going to happen. The investors did not put the final nail in the coffin. Covid did.