This is the same for e-scooter rideshare schemes. Much of the evidence points to escooter use replacing walking short distances, so environmentally it can be a net negative overall.
Honestly the fact that they all become trash is why scooters annoy me. Like sure fine on a long enough time scale pretty much everything becomes trash but man they are not built to last.
Are they not built to last, or are they just abused and neglected? I suspect that personally-owned scooters tend to be kept somewhere safe and taken care of. VC-owned rental scooters tend to get trashed, because no one suffers a personal loss if a particular scooter becomes trash.