Estimates are SEC mandated informed guesses based on specific data. Beating estimates is better than not beating them, but if the estimates and results are negative quarter after quarter, year after year, that's not good. Especially big negative numbers, if you're almost breaking even you can muddle along with financing as needed until the board/shareholders get sick of it and fire the execs.

Industry financial analysts do seem to think B6 will get close to breaking even in 2027, so I wouldn't call it a death spiral at this point (maybe runup to M&A).