SFMTA has published the detailed feedback[1] and summary ratings[2] for each petition. Although the actual applications are not published, it really looks like Bird did a poor job on paper. For example, most of the companies relied on swipe-through screens in apps to remind people to use helmets, which the SFMTA deems insufficient. I have to agree, as I have rarely seen someone on a scooter with a helmet.
[1] https://www.sfmta.com/sites/default/files/reports-and-docume...
[2] https://www.sfmta.com/sites/default/files/reports-and-docume...
Also, note that Scoot already has an arrangement with the city for the red electric mopeds they rent out.